look up any word, like trill:
 
1.
The sound one makes before exploding violently.
Person 1: Dude, you were supposed to cut the red wire, not the blue one.

Person 2: Oh crap.
by Everythingtatseslikepurple May 19, 2010
 
2.
When you fucked up.
When you figure out your girlfriend has Crabs-Oh Crap
by Jvandy11 March 18, 2009
 
3.
The word used to express your shock right before you get into a car crash.
by Norma Jean October 19, 2005