when you feel like you're going to take a crap but nothing or almost nothing comes out.

Whenever making a congratulatory remark, this is what you say. Made popular by Kamala Harris when she and Joe Biden won the presidency.

When you are too edgy to say ghost shit, so you say the polished version of it.

So like, when you are at school, and the teacher doesn't want you to cuss, you say ghost crap. But I have no clue why people would you say "ghost crap" at school.