The exclamation you commonly make when the autocorrect feature in your phone maliciously decides to "correct" your text message spelling in the worst way possible.
Popularised on damnyouautocorrect.com
> Wanna come over for lunch?
# No thanks, I'm so full, I just ate two foot-long hot dongs.
> I bet you just gobbled those right up!
# Damn you autocorrect!!