when someone says something that would usually be upsetting, you would respond with "oof". It is usually used when you do not have a response to a problem being presented to you. it originated from a game called roblox, where when you die it says "oof".
person one : "i'm so angry about the donald trump wall"
person two : "oof"
The Roblox sound, which eventually became a meme
*10yr old playing Roblox dies in-game*
His character: OOF!
Oof is an awesome term for falling and saying "ow"
*trips epically and cutely* "OOF I fell"
A way of saying oh no, ugh, or why.
Julia: I just dropped my apple!
James: Oof.
The ROBLOX death noise. Also the word of expression you use when you fall down on the snow that's coated with ice here in the midwest.
My Friend: Bring the sled back up!
Me: Ok
*Walking*
Me: Oh no- OOF!