السبت خالتي رح تجي عالبيت، وامي بدها تطبخ غدا.

It can mean both in this kind of sentence. In Levantine, a day word like السبت is often used without a separate word for on. So السبت naturally means on Saturday from context.

Putting it first is also very normal. Arabic often starts with a time expression:

• السبت خالتي رح تجي...
• On Saturday, my aunt will come...

It is usually pronounced something like is-sabt or es-sabt, not al-sabt.

That is because س is a sun letter, so the ل in الـ is not pronounced separately. The article assimilates:

• السبت → is-sabt / es-sabt

This is a pronunciation rule, not a change in meaning.

خالتي means my maternal aunt — your mother’s sister.

Arabic makes an important family distinction here:

• خالتي = my mother’s sister
• عمتي = my father’s sister

So English my aunt can split into different words in Arabic, depending on which side of the family you mean.

The ending -ي means my.

So:

• خالة = aunt
• خالتي = my aunt

And:

• أم / ام = mother
• أمي / امي = my mother

In خالتي, the feminine ending ـة becomes a pronounced t before the possessive ending:

• خالة → خالتي

That is very common in Arabic.

رح is a future marker in Levantine. It tells you the action is in the future.

So:

• تجي = she comes / she is coming
• رح تجي = she will come / she is going to come

You will also hear حـ in many Levantine varieties with the same job:

• حتجي

In the Levantine imperfect verb system, تـ can mark she as well as you in some forms. So تجي can mean:

• she comes
• you come

Context tells you which one is meant. Here, because the subject is خالتي, it clearly means she will come.

Also, to come is a somewhat irregular verb in colloquial Arabic:

• base idea: إجا / يجي
• here: تجي = she comes

عالبيت is a colloquial spelling of عَ البيت, which comes from على البيت.

In Levantine:

• على often becomes عَ
• عَ البيت can be written as عالبيت

With a verb like come, it usually means home or to the house.

So this is a very everyday Levantine structure, not formal written Arabic.

Most literally, بدها means she wants.

So:

• بدها تطبخ = she wants to cook

In Levantine, بدّ + a pronoun ending + an imperfect verb is extremely common:

• بدي أروح = I want to go
• بدك تيجي = you want to come
• بدها تطبخ = she wants to cook

Depending on context, it can sometimes sound close to is going to as well. Also, Arabic does not need a separate word like English to before the second verb here.

وامي is just و + امي together:

• و = and
• امي = my mother

So وامي means and my mother.

In informal Arabic writing, people often write these together, and they may also skip the hamza:

• وأمي
• وامي

Both are easy to recognize in context.

No — here it means lunch.

That can confuse learners, because in Standard Arabic غدًا can mean tomorrow. But in Levantine everyday speech, غدا often means lunch, related to Standard Arabic غداء.

Context makes it clear here:

• بدها تطبخ غدا = she wants to cook lunch

If the sentence meant tomorrow, Levantine would much more naturally use بكرا.

Because this is a Levantine colloquial sentence, not formal Standard Arabic.

Some colloquial features here are:

• رح instead of formal future markers like سوف
• عالبيت instead of إلى البيت
• امي as an everyday spelling of أمي
• natural spoken-style word order

So this sentence sounds like something people would actually say in conversation, which is exactly what you want for Levantine.