مزاجي مو منيح اليوم، بس نكتتك ضحكتني.

Because in Levantine Arabic, the present-tense verb to be is usually not said.

So:

• مزاجي مو منيح اليوم
• literally: my mood not good today
• natural English: My mood isn’t good today or I’m not in a good mood today

This is very normal in Arabic. You do not need a separate word for is here.

مزاجي literally means my mood.

It is made of:

• مزاج = mood
• -ي = my

So مزاجي = my mood

This kind of attached pronoun is very common in Arabic.

Because the adjective agrees with مزاج, not with the speaker.

• مزاج is a masculine noun
• so the adjective is masculine too: منيح

So even if a woman says this sentence, she still says:

• مزاجي مو منيح

because mood is masculine.

مو is a very common Levantine way to say not.

So:

• مو منيح = not good

Yes, in many dialects and even within Levantine, you may also hear مش. Both are common, but مو is extremely natural in Levantine speech.

So these can both work in many contexts:

• مزاجي مو منيح اليوم
• مزاجي مش منيح اليوم

منيح is a very common Levantine word meaning good, fine, okay, or well, depending on context.

Here:

• مزاجي مو منيح = my mood is not good

You will hear منيح all the time in Levantine Arabic. It is one of the basic everyday words for good/fine.

Here, بس means but.

So:

• بس نكتتك ضحكتني = but your joke made me laugh

Be careful: بس can also mean only / just in other sentences. Context tells you which meaning is intended.

Yes, اليوم can move around. Arabic is fairly flexible with time expressions.

In this sentence:

• مزاجي مو منيح اليوم = My mood isn’t good today

But you could also hear:

• اليوم مزاجي مو منيح
• مزاجي اليوم مو منيح

All of these are possible. Putting اليوم at the end is very natural.

Yes, you can say:

• أنا مزاجي مو منيح اليوم

But you do not have to.

Arabic often leaves out subject pronouns when they are already clear from context. Since مزاجي already means my mood, the speaker is obvious. Adding أنا can give a little extra emphasis, like:

• As for me, I’m not in a good mood today

This is a great question.

نكتتك comes from:

• نكتة = joke
• -ك = your

The noun نكتة ends with ة. When a suffix is added, that ending becomes a pronounced t.

Also, in this word, there is already a ت as part of the noun itself. So when the suffix is added, you get:

• نكتة + ك → نكتتك

So نكتتك means your joke.

Also note:

• the written form does not show short vowels
• so it could be pronounced differently depending on whether you are speaking to a man or a woman

Very roughly:

• to a man: niktitak
• to a woman: niktitik

In this sentence, ضحكتني means it made me laugh.

It breaks down like this:

• ضحّك = to make someone laugh
• feminine past form: ضحّكت
• -ني = me

So:

• ضحّكتني = it made me laugh

Why feminine? Because نكتة is feminine, so the verb agrees with it:

• نكتتك ضحكتني = Your joke made me laugh

Also, Arabic writing often leaves out the shadda sign, so you may see ضحكتني written without it, even though the intended verb is the one meaning made laugh.

A rough literal breakdown is:

• مزاجي = my mood
• مو = not
• منيح = good
• اليوم = today
• بس = but
• نكتتك = your joke
• ضحكتني = made me laugh

So the sentence is roughly:

• My mood [is] not good today, but your joke made me laugh.

That kind of literal breakdown is very useful for understanding how Levantine builds meaning.