بين ما نحنا عم نلبس المايوهات، حصة السباحة بتبلش.

Here بين ما means while or as. It introduces an action that is happening at the same time as another action.

So:

بين ما نحنا عم نلبس المايوهات = while we’re putting on the swimsuits

In Levantine, this is a natural way to set up a background action. It is similar to بينما in more formal Arabic, but بين ما sounds more colloquial.

Yes, the verb already shows we:

• نلبس = we wear / we put on

So technically, نحنا is not required.

It is included for emphasis or clarity, and this is very common in spoken Arabic. Native speakers often say the pronoun even when the verb already shows the subject.

So:

• بين ما عم نلبس المايوهات = while we’re putting on the swimsuits
• بين ما نحنا عم نلبس المايوهات = while we are putting on the swimsuits

The second one can feel a little more explicit or conversational.

عم + present verb is the common Levantine way to express the progressive aspect, meaning be doing something.

So:

• نلبس = we wear / we put on / we wear generally
• عم نلبس = we are putting on / we are wearing right now

In this sentence, عم نلبس shows an action in progress.

So the idea is not just we wear swimsuits, but specifically we’re in the process of putting them on.

لبس / يلبس is the everyday spoken verb for to wear or to put on clothes in Levantine.

• نلبس = we wear / put on

ارتدى / يرتدي is much more formal and is associated more with Modern Standard Arabic than casual Levantine conversation.

So in natural spoken Levantine, نلبس is exactly what you would expect here.

المايوهات means the swimsuits.

It comes from the borrowed word مايوه meaning swimsuit. This word is widely used in many Arabic varieties.

The plural here is مايوهات, which is a common colloquial plural pattern for some borrowed nouns.

So:

• مايوه = swimsuit
• المايوهات = the swimsuits

A learner should notice that borrowed words often behave a little differently from older Arabic vocabulary, especially in their plurals.

This is an idafa construction, often called a construct phrase.

• حصة = class / period / session
• السباحة = swimming

Together:

حصة السباحة = the swimming class or swimming class

In an idafa:

• the first noun usually does not take ال
• the second noun can make the whole phrase definite

So حصة السباحة naturally means the swimming class.

That is why الحصة السباحة would sound wrong here.

Because حصة is feminine.

In Levantine, the verb agrees with the subject in gender, so with a feminine singular subject you often get بتـ.

• حصة = class/session, feminine
• بتبلش = it starts, with feminine agreement

Compare:

• الدرس بيبلش = the lesson starts
  because درس is masculine
• الحصة بتبلش = the class starts
  because حصة is feminine

So بتبلش is exactly what we expect with حصة السباحة.

In Levantine, the b- prefix usually marks the ordinary present tense, especially for habitual, general, or simple present meaning.

So:

• تبلش can appear in other structures depending on context
• بتبلش = starts / is starting

In this sentence, بتبلش gives a normal spoken present meaning. Depending on context, English might translate it as:

• starts
• is starting
• sometimes even starts up or begins

It is a very common feature of Levantine verbs.

This is very normal in Arabic and in English too.

حصة السباحة بتبلش literally uses the present, but in context it can describe:

• something happening now
• something that regularly happens
• something scheduled

So if the meaning is something like the swimming class starts while we’re putting on our swimsuits, the present works well in Arabic.

Spoken Arabic often uses present forms where English might choose:

• present simple
• present progressive
• or even a future-like scheduled meaning

Context decides the best translation.

Yes, that is the natural implication.

Because بين ما نحنا عم نلبس المايوهات describes an action still in progress, and حصة السباحة بتبلش happens during that time, the sentence suggests overlap:

• we are still putting on the swimsuits
• the swimming class starts during that process

So the feeling is something like the class starts while we’re still getting changed.

Yes. This is a very natural structure:

بين ما + background action, then the main clause

So:

بين ما نحنا عم نلبس المايوهات، حصة السباحة بتبلش.

This is similar to saying in English:

While we’re putting on our swimsuits, the swimming class starts.

You could also rearrange the sentence in some contexts, but the version given is completely normal and easy to understand.

Yes, بلّش / يبلّش is very common in Levantine for to begin / to start.

In more formal Arabic, you would often see بدأ / يبدأ instead.

So:

• Levantine: بتبلش
• MSA: تبدأ

A learner should recognize بلّش as a very common spoken verb in the Levant.

Yes. Depending on region and style, speakers might also use other expressions for while, such as:

• وإحنا عم نلبس... = and while we’re putting on...
• لما كنا عم نلبس... = when we were putting on...
• بينما = while, but more formal

Still, بين ما is a good colloquial choice and fits the sentence well. It sounds spoken and natural in Levantine.