Used when someone is being silly or intoxicated. For instance, if someone said something that was crazy or just plain stupid you would reply with "your off your chops!"

Then again, this word is mostly used when someone is pissed and are acting like a complete fool.

Someone people turn to when they're sad who makes them feel better.

When one is
a) High
b) Drunk
c) Acting in a manner expected of retarded children or intelligent apes
d) Saying something very unintelligent