first two words when somebody trys to insult you or your mother.
your mama so fat she stepped on a scale and it said why are you givin me your phone number!
The act of talking over everyone head about stuff nobody cares about.
Mark: How many seconds are there in a year? If I tell you there are 3.155 x 10^7, you won't even try to remember it. On the other hand, who could forget that, to within half a percent, pi seconds is a nanocentury.
Somebody else: Huh? Who cares.