سيبت الكيس جنب سلة الزبالة، وماما قالت لي حطه عند باب البيت.

It is Egyptian Arabic.

A few clues:

• سيبت is a colloquial Egyptian past form of to leave
• الزبالة is the everyday Egyptian word for trash / garbage
• حطه is a very Egyptian-style imperative with an attached object pronoun
• ماما is very common in everyday speech
• In pronunciation, Egyptians often say ج as g and ق as a glottal stop ء

A more MSA-like version would sound much more formal, for example:

• تركتُ الكيس بجانب سلة المهملات، وقالت لي أمي ضعه عند باب البيت

سيبت is the past tense, first person singular form of the verb ساب / يسيب, meaning to leave.

So grammatically it means:

• I left

In Egyptian Arabic, the subject pronoun is often omitted because the verb already tells you who the subject is.

So:

• سيبت = I left
• you do not need أنا unless you want emphasis

You may also see this verb written a little differently in colloquial spelling, since dialect spelling is not fully standardized.

Because the verb itself already shows the subject.

In سيبت, the ending tells you this is I in the past tense. Egyptian Arabic, like MSA, often leaves subject pronouns out when they are clear from the verb.

The same thing happens later with قالت:

• قالت = she said
• no separate هي is necessary

That is a very common Egyptian pronunciation pattern.

Two important sound changes in Egyptian Arabic are:

• ج often sounds like g
  • so جنب is often pronounced gamb
• ق often sounds like a glottal stop ʔ
  • so قالت is often pronounced ʔālet

This is one of the big things that makes Egyptian Arabic sound different from MSA.

Because Arabic often expresses of using an iḍāfa structure, sometimes called a construct phrase.

So:

• سلة الزبالة = the trash basket / trash can
• باب البيت = the door of the house

There is no separate word like English of.

A useful rule:

• the first noun usually does not take ال
• the second noun can be definite
• if the second noun is definite, the whole phrase becomes definite

So:

• سلة الزبالة = the trash basket
• باب البيت = the house door / the front door

Because سلة ends in ة (tāʾ marbūṭa).

When a word ending in ة is said by itself, that ending often sounds like -a. But in an iḍāfa phrase, it is pronounced as -t.

So:

• سلة by itself → roughly salla
• سلة الزبالة → sallet ez-zabāla

This is a very common pattern in Arabic.

This is because of sun letters and moon letters.

• ز is a sun letter
  • so الزبالة is pronounced ez-zabāla
  • the l sound in ال assimilates to the z
• ب is a moon letter
  • so البيت keeps the l sound
  • it is pronounced el-bēt

So the spelling stays the same, but the pronunciation changes.

They are both location words, but they are not the same.

• جنب = next to / beside
• عند = at / by / near

In this sentence:

• جنب سلة الزبالة means the bag was left next to the trash can
• عند باب البيت means at / by the house door

So جنب is more specifically beside, while عند is more general.

قالت means she said, and لي means to me.

So:

• قالت لي = she said to me / she told me

A few grammar points:

• قالت is feminine singular past tense
• the -ت tells you the subject is she
• لي is the preposition لـ
  • the pronoun ي
• together, لي means to me

In everyday Egyptian, this structure is very common before reported speech or a command.

حطه is:

• the imperative حط = put
• plus the attached object pronoun -ه = it / him

So حطه means:

• put it

In this sentence, it clearly means put it, referring to the bag.

Also, this form is masculine singular imperative, so it sounds like the mother is speaking to one male person.

If she were speaking to a female, you would usually hear something like:

• حطيه

That is a normal Egyptian Arabic pronunciation feature.

Although it is written ه, in attached pronouns it often sounds like:

• -o
• or sometimes something close to -u

So حطه is often pronounced something like:

• ḥoṭṭo

That is still the same pronoun -ه, just pronounced the Egyptian way in connected speech.

Because باب البيت is more specific.

• الباب = the door
• باب البيت = the house door or the front door

In English, we often just say the door if the context is obvious. In Arabic, it is also very common to make the relationship explicit with an iḍāfa phrase like باب البيت.

So this phrase sounds very natural.

It is very natural.

In Egyptian Arabic, ماما is extremely common in everyday speech when talking about your mother. It does not necessarily sound childish. Adults use it too, especially in family conversation or casual speech.

A more formal or neutral alternative would be:

• أمي = my mother

But in ordinary speech, ماما is completely normal.

One natural pronunciation would be:

sibt il-kīs gamb sallet ez-zabāla, wi-māma ʔālet li ḥoṭṭo ʿand bāb il-bēt

A few notes:

• جنب → gamb
• قالت → ʔālet
• سلة الزبالة → sallet ez-zabāla
• حطه → ḥoṭṭo
• و at the start of a phrase is often pronounced wi

Exact vowels can vary a bit by speaker, but this is a good Egyptian-style reading.