¡Anda ya! ¡Qué va! Ni idea.

Because Spanish often uses set phrases as complete utterances in conversation, especially in informal speech.

Here, each part works on its own:

• ¡Anda ya! = a reaction, often disbelief or dismissal
• ¡Qué va! = a strong no, or not at all
• Ni idea. = no idea

Putting them together creates a very natural, spoken rhythm: short, punchy, emotional responses rather than a carefully structured sentence.

Yes, it comes from the verb andar, and literally anda is the tú imperative form: walk / go on / come on.

But in ¡Anda ya!, it is not being used literally. It has become an idiomatic interjection.

So in this expression, you should not interpret it as actual movement. It functions more like:

• Come on!
• Oh, please!
• Yeah, right!

depending on tone and context.

Ya often adds emphasis in Spanish. In ¡Anda ya!, it helps make the expression sound more forceful, dismissive, or incredulous.

Compare the feeling:

• ¡Anda! = surprise, mild reaction, sometimes encouragement
• ¡Anda ya! = stronger disbelief, dismissal, or oh, come on

So ya is not really meaning already here in a literal way. It is part of the idiomatic effect.

It can be, depending on:

• tone of voice
• facial expression
• relationship with the other person
• context

It may sound:

• playful among friends
• skeptical
• annoyed
• dismissive

So yes, it can come across as rude if said sharply. Native speakers often rely heavily on intonation here.

Grammatically, it looks like qué + va (what goes), but as a fixed expression it does not work like a literal sentence.

In practice, ¡Qué va! is an idiomatic conversational phrase meaning something like:

• No way
• Not at all
• Of course not

You should learn it as a chunk rather than trying to analyze it word by word too literally.

Yes, it is especially associated with Spain Spanish and is very common there.

Learners should know that:

• In Spain, ¡Qué va! is very natural.
• In many parts of Latin America, people may understand it, but they may use other expressions more often.

So if you are learning Spanish from Spain, this is a very useful expression to recognize and use.

Yes. It can respond to different kinds of statements or questions.

For example:

• If someone says something unbelievable: ¡Qué va! = No way!
• If someone asks something like Are you tired? and the answer is no: ¡Qué va! = Not at all

So the exact English translation changes with context, even though the Spanish expression stays the same.

Because ni in Spanish is often used in negative emphasis, especially in short elliptical expressions.

Ni idea is a very common idiomatic way to say no idea.

It is related to fuller sentences like:

• No tengo ni idea. = I have no idea.

In the short version, the verb is omitted, but the meaning remains clear. This kind of omission is very common in conversation.

It is elliptical, not incorrect.

The full sentence would usually be:

• No tengo ni idea.

But in everyday speech, Spanish often drops words that are obvious from context. So Ni idea is a perfectly natural shortened answer.

English does the same kind of thing:

• No idea.
• No problem.
• No chance.

So although it is not a full sentence in a formal grammatical sense, it is completely normal in conversation.

No, that would sound ungrammatical or at least very unnatural in standard Spanish.

The natural choices are:

• Ni idea.
• No tengo ni idea.

So this is one of those cases where Spanish does not mirror English word for word.

Spanish uses:

• ¡ ! for exclamations
• ¿ ? for questions

The opening mark tells you from the beginning what kind of intonation to expect.

So:

• ¡Anda ya!
• ¡Qué va!

are written with both opening and closing exclamation marks. This is standard Spanish punctuation.

In careful writing, yes, if you want to reflect the exclamatory tone correctly.

However, in very informal texting, native speakers sometimes reduce punctuation or omit opening marks, especially online. But for learners, the safest standard forms are:

• ¡Anda ya!
• ¡Qué va!
• Ni idea.

Note that Ni idea does not have to be written with exclamation marks unless you want extra emphasis: ¡Ni idea!

The most important thing is intonation.

A natural pattern would be:

• ¡Anda ya! — strong disbelief or dismissal
• ¡Qué va! — firm falling tone
• Ni idea. — flat or final tone, often a little shrug-like

A few pronunciation points:

• anda: AHN-da
• ya: the y is pronounced like a soft y/j sound depending on accent
• qué: stressed because of the written accent
• va: simple ba/va sound depending on how you hear Spanish v/b
• idea: three syllables, roughly i-DE-a

In Spain, delivery and tone matter more than individual words here.

Yes, especially in expressive speech, but not because they form one fixed three-part formula.

A speaker might stack them to sound more emphatic:

• ¡Anda ya!
• ¡Qué va!
• Ni idea.

This gives a feeling like:

• disbelief
• rejection
• total lack of knowledge or agreement

It is very conversational and dramatic. Native speakers often pile up short reactions like this for effect.

They are definitely informal.

You would hear them in:

• everyday conversation
• chats with friends
• casual spoken Spanish
• TV dialogue

You would usually avoid them in:

• formal writing
• professional emails
• very polite situations

Especially ¡Anda ya! can sound too blunt in formal contexts.

If you want to sound less colloquial or less emotional, you could use:

Instead of ¡Anda ya!

• No me digas. depending on context
• No puede ser.
• Venga ya. though this is also informal

Instead of ¡Qué va!

• No.
• En absoluto.
• Para nada.

Instead of Ni idea

• No lo sé.
• No tengo ni idea. still informal but very common
• No sabría decirte. more cautious/polite

These alternatives change the tone, not just the meaning.