لما بصحى لوحدي في الاجازة، بقرا شوية في السرير.

Here لما means when or whenever and introduces a time clause.

Because the sentence is about a habit, لما is best understood as whenever:

• لما بصحى... بقرا...
  When/Whenever I wake up... I read...

So it is not just one single event; it describes something that usually happens.

In Egyptian Arabic, بـ usually marks the habitual / regular present.

So:

• بصحى = I wake up / I usually wake up
• بقرا = I read / I usually read

That fits this sentence, because it is describing a routine during vacation.

Because the verb already shows the subject.

In Egyptian Arabic, subject pronouns are often left out unless you want emphasis or contrast. So:

• بصحى already means I wake up
• بقرا already means I read

You could say أنا بصحى... or أنا بقرا..., but that would sound more emphatic, like I wake up / I read.

لوحدي means alone, by myself, or on my own.

It is a very common Egyptian expression built from لوحد plus a pronoun ending:

• لوحدي = by myself
• لوحدك = by yourself
• لوحده = by himself

In this sentence, it means the speaker wakes up on their own, not with other people around or not being woken by someone else.

الاجازة in Egyptian Arabic can mean vacation, holiday, break, or time off, depending on context.

So في الاجازة can mean:

• during vacation
• on vacation
• during the break

In this sentence, it most naturally means something like during vacation or when I’m off.

شوية means a little, a bit, or some.

With actions, it often means for a little while rather than a small physical amount. So:

• بقرا شوية = I read for a bit
• or I do a little reading

It makes the sentence sound more natural and less absolute than just saying بقرا.

Because Arabic uses في very broadly for location.

Literally, في السرير is in the bed, but idiomatically it is the natural way to say in bed. Depending on context, English might say in bed or on the bed, but Arabic often just uses في.

So here بقرا شوية في السرير naturally means I read a little in bed.

That is very common in informal Egyptian writing.

The verb corresponds to MSA أقرأ. In everyday Egyptian Arabic spelling, hamzas are often simplified or omitted, so بقرا is a normal way to write I read.

So this is not a different word; it is just a common colloquial spelling style.

It describes a habit.

There are two main clues:

• the بـ in بصحى and بقرا
• the time clause with لما, which here means whenever

So the overall sense is:

• Whenever I wake up by myself during vacation, I read a little in bed.

Yes, very normal.

Arabic often puts the time clause first:

• لما بصحى لوحدي في الاجازة، بقرا شوية في السرير.

This is just like English When I wake up..., I read...
You can move things around in Arabic for emphasis, but this order is natural and common.

Because it is doing two different jobs:

• في الاجازة = during vacation / on vacation
• في السرير = in bed

Egyptian في is very flexible and covers several meanings that English may express with different prepositions.

You would normally switch to past tense verbs:

• لما صحيت لوحدي في الاجازة، قريت شوية في السرير.

That means:

• When I woke up by myself during vacation, I read a little in bed.

So the original sentence is habitual/present, while this version refers to one past occasion.