An expression of extreme suprise, excitement, love, and/or fear. It is often found conjugated with the words yes or no after its main context.
Eve: Here take this apple!
Adam: *munch* wait a second... oh fuck...
Captain Adama: The Cylons look like us now.
Starbuck: Oh fuck!
Girlfriend: Honey I think its time we had sex.
Boyfriend: Ohhhhhhhhhhhhhhhhhhhhh Fuck.
Teen 1: I heard Obama's goona legalize pot.
Teen 2: Oh fuck!
Parents: Oh fuck...