Oof

Used when someone hates someone, or has roasted someone.

Also used in context when someone is expressing discomfort from a sudden blow.

Also used my Robloxians.

Sentence 1:
Bobby Bill: At least my parents got to choose me, yours got stuck with you!
Billy Bob: OOF!

Sentence 2:
Billy Boob: Ow, my side hurts from when I got oofed yesterday.
Boob Billy: R.I.P Billy Boob.