The sound that an idiot makes after they get hurt, or another person
Oh he’s about to fall? Oof, lol he fell
When you roll down a hill in front of your mom...
Mom: timmy don't roll down that hill till you're dead!
Timmy: OOF! *Rolls down hill...*
mom: *CONFUSION*
O(f(x))
Oof is the composition of functions O(x) and f(x) (when the function definition field is common)
they all sang "oofidy oofidy oof dun dun"
1. u say it when ur classmate or friend says a statement about being him/her being hurt or forget something important to them and u reply "OOF!"
2. when u dont care about the statement and u say oof cause u heard yur friend says something about being hurt
friend: dude i forgot my Latin Binder!
me: OOF!!!!!