المايوه وقبعة السباحة بالشنطة.

In Levantine Arabic, the present-tense verb to be is usually omitted. So a sentence like المايوه وقبعة السباحة بالشنطة literally looks like the swimsuit and swim cap in the bag, but it naturally means The swimsuit and the swim cap are in the bag.

If you wanted past or future, Arabic would show that more explicitly:

• كانوا بالشنطة = they were in the bag
• رح يكونوا بالشنطة = they will be in the bag

بالشنطة is made of:

• بـ = a preposition
• الشنطة = the bag

So literally it is in/with the bag, and in this sentence it means in the bag.

This kind of attached spelling is very normal in Arabic. Prepositions often attach directly to the following word.

In Levantine, بـ is often used where English would use in, at, or sometimes with, depending on context. So بالشنطة can naturally mean in the bag.

You could also hear:

• في الشنطة = in the bag

For many learners, في feels more transparent because it maps neatly to English in. But بـ is extremely common in spoken Levantine, so this sentence sounds natural.

Roughly, it is pronounced bish-shanTa or besh-shanTa, depending on the speaker.

The reason is that ش is a sun letter, so the ل sound of الـ is not pronounced. That means:

• الشنطة is pronounced roughly ash-shanTa
• بالشنطة is pronounced roughly bish-shanTa

So even though the spelling has ال, the l sound disappears in pronunciation.

Because this is an idafa construction, the very common Arabic way of saying things like:

• swim cap
• school bag
• car door

In an idafa, the first noun usually does not take الـ. So:

• قبعة السباحة = the swim cap / literally cap of the swimming

Here:

• قبعة = cap
• السباحة = the swimming

Because the second part is definite, the whole phrase is definite. That is why you do not say القبعة السباحة here.

Because the phrase is being treated as a definite noun phrase: the swim cap.

In Arabic idafa, definiteness is often carried by the second noun. So:

• قبعة سباحة = a swim cap / swimming cap
• قبعة السباحة = the swim cap

So the الـ on السباحة helps make the whole phrase definite.

Because it refers to a specific swimsuit: the swimsuit.

Arabic marks definiteness very clearly. So:

• مايوه = a swimsuit
• المايوه = the swimsuit

In this sentence, both items are specific, known items:

• المايوه
• قبعة السباحة

مايوه is a borrowed word, widely used in everyday speech for swimsuit. It is not an old native Arabic word in the classical sense; it came into Arabic through borrowing, often associated with French maillot.

In speech, pronunciation can vary a bit by region, but learners will commonly hear something like:

• mayyo
• mayyoh

It is a very normal everyday word in many Arabic-speaking areas.

It is understandable in Levantine, but it has a slightly mixed feel.

• المايوه sounds very everyday and colloquial.
• شنطة is also very common in spoken Levantine.
• قبعة السباحة is understandable, but it can sound a bit more standard or careful than very casual speech.

In very casual Levantine, some speakers might use a different word for cap, such as a borrowed word like كاب. So you might hear alternatives depending on region and speaker. But the sentence you have is still perfectly understandable.

Yes. Arabic is flexible with word order, especially when one part is a location phrase.

Your sentence:

• المايوه وقبعة السباحة بالشنطة

could also be said with the location first:

• بالشنطة المايوه وقبعة السباحة

That can sound a bit like In the bag are the swimsuit and the swim cap. The original version is completely normal; changing the order mainly shifts emphasis.