an exclamitory word. it is used when one randomly sneaks up upon an unsuspecting victim, preceded by violently screaming "YING!" in their ear, thereby scaring the shit out of them.
Yang said "Hey Ying, you suck?"
Ying repied " Yeah, lets swim together, I know just love swimming with me, Ying."
Yang than replied "Keep circling me Ying, you circle jerk."
A word said in reaction to an absurd or ridiculous statement, comment, action, etc. Can also be said in reaction to something such as article of clothing, a situation, a person, a place, or thing.
Guy #1: Hopefully some beezy's come over tonight who want to drink and have sex...
Guy #2: Oh Ying, like that would ever happen.
or
White nerdy kid: (walks up wearing baggy jeans, a tall tee, and forces) Check this out dude I'm dressed like thug nation for this party tonight.
His Friend: Ying.., I am definitely going to hit up someone else to go to this party with.