What is Oh Butt?
1.
When you are walking through the halls of your school and you see a hot chick with a nice ass. You don't know her but you feel like you should say something to tell her shes hot. So you say "oh butt" so you are satisfied that you actually said something...
You walking down the hall and you pass a girl
You turn around and see that she has a NICEEEE ass
Yell out, "OH BUTT"
See