When someone is absolutely owning or winning at something, they are said to be "cookin' tits." Usually exclaimed by hipsters pretending to be cool.
Hipster: Dude! I just got 7 different phone numbers from hot asian chicks over there!
Other Hipster: Holy shite! You're cookin' tits.
Other Hipster: Holy shite! You're cookin' tits.
by Slim Shady Lady May 3, 2011