حطيت صباعي على الشاشة.

حطيت means I put or I placed.

It comes from the Egyptian Arabic verb حطّ = to put / to place.

In this sentence, حطيت is in the past tense, so the full sentence is talking about something completed: I put my finger on the screen.

In Egyptian Arabic, many verbs in the past tense take endings that show who did the action.

With حطّ:

• حطّ = he put
• حطّيت = I put / you put (singular)

So the ending -يت is a common past-tense ending.

A useful thing to know:
حطيت can mean either I put or you put. Context tells you which one is meant.

In your sentence, because of صباعي = my finger, it clearly means I put.

Because صباع means finger, and the ending -ي means my.

So:

• صباع = finger
• صباعي = my finger

This -ي ending is a very common way to show possession in Arabic.

Examples:

• كتابي = my book
• بيتي = my house
• إيدي = my hand

Yes, صباع is a very common Egyptian Arabic word for finger.

A learner might also encounter:

• إصبع or إصبَع in more formal Arabic / MSA

So:

• Egyptian everyday speech: صباع
• More formal / MSA: إصبع

That means this sentence sounds naturally Egyptian and conversational.

على means on.

So:

• على الشاشة = on the screen

It is the normal preposition to use when something is physically touching or placed on a surface.

Examples:

• على الترابيزة = on the table
• على الحيطة = on the wall
• على الشاشة = on the screen

Because الشاشة means the screen, while شاشة means a screen.

The prefix الـ is the Arabic definite article, meaning the.

So:

• شاشة = a screen / screen
• الشاشة = the screen

In this sentence, English also uses the screen, so الشاشة matches that.

Yes, in pronunciation the ل of الـ is assimilated here.

That is because ش is a sun letter. So الشاشة is pronounced roughly like:

ash-shaasha

not al-shaasha

This happens with many words beginning with sun letters.

So in speech:

• الشاشة sounds like ash-shaasha

But in spelling, it is still written الشاشة.

The word order is:

حطيت + صباعي + على الشاشة
I put + my finger + on the screen

That is very natural in Egyptian Arabic.

Arabic often allows some flexibility, but this order is simple and common:

1. verb
2. object
3. prepositional phrase

So this sentence is a nice example of a basic everyday pattern.

A rough pronunciation guide is:

ḥaṭṭeet sba3i 3ala sh-shaasha

A few important sounds:

• ح in حطيت: a strong breathy h, deeper than English h
• ط: a heavier, darker t
• ع in على: a sound English does not have; many learners first approximate it lightly or treat it as a voiced catch in the throat
• ش = sh

Very rough English-style approximation: haṭ-TEET sbaa-3ee 3a-la ish-SHAA-sha

Not perfect, but good enough as a starting point.

Because in Arabic, possession is often shown by attaching a suffix directly to the noun.

So instead of saying a separate word like my finger, Egyptian Arabic says:

• صباع = finger
• صباعي = my finger

This is different from English, but it is one of the most common patterns in Arabic.

Other examples:

• أخويا = my brother
• أمي = my mother
• موبايلي = my phone

Yes, it can sound natural, especially if you mean I put my finger on the screen.

But depending on the exact context, Egyptians might also use other verbs:

• لمست الشاشة بصباعي = I touched the screen with my finger
• دست على الشاشة = I pressed on the screen
• حطيت صباعي على الشاشة = I put my finger on the screen

So حطيت صباعي على الشاشة emphasizes the placement of the finger, while other verbs might emphasize touching or pressing.

In Modern Standard Arabic, you would more likely see something like:

وضعتُ إصبعي على الشاشة

Compared with the Egyptian sentence:

• حطيت instead of وضعتُ
• صباعي instead of إصبعي

So the Egyptian version is:

• more conversational
• more natural in daily speech
• less formal than MSA

That is exactly what you want for spoken Egyptian Arabic.