scoping hallway

[shinem]

In this sentence what does scoping hallway mean?

I was so lost in thought that I wasn’t scoping the hallway.

Did the speaker forget that he's in hallway because of thinking?

Thanks.

[JohnParis]

No, not quite.
Here "scoping" is the intransitive verb "to scope".
It's very informal and it means to look at carefully; to scan.
Example: they watched him scoping the room, looking for Michael.

In your sentence, the speaker was so engrossed in thought that he forgot he was to closely observe the hallway.

John

[shinem]

All right I got it, thank you very much :D