who's your daddy
Used as an insult to demonstrate authority, hence the "daddy" part. Most likely performed by the giving end after the recieving end is pwned/owned. Also used by Superfly, one of Joe Cartoon's characters.
Example:
Billy: Oh yeah! I just scored 15 3 pointers on your punk ass!
John: Dammit, man..
Billy: Who's your daddy?!
Superfly: Hey man, what's up?
Santa: What's up? Heh heh. What's up?
Superfly: You know who your daddy is? It's me, yeah! I'm your daddy! Do you know how come I'm your daddy? 'Cuz I did this to your momma! Yeah, YOUR momma! Call me Superfly! Your momma!
Billy: Oh yeah! I just scored 15 3 pointers on your punk ass!
John: Dammit, man..
Billy: Who's your daddy?!
Superfly: Hey man, what's up?
Santa: What's up? Heh heh. What's up?
Superfly: You know who your daddy is? It's me, yeah! I'm your daddy! Do you know how come I'm your daddy? 'Cuz I did this to your momma! Yeah, YOUR momma! Call me Superfly! Your momma!