who is you?

a question asked when concerned with/questioning/mad at something someone has said or done.

A rhetorical question, generally in the form of an insulting chant, accompanied by finger-pointing; meant as abuse to a single person or team performing in front of a crowd, by indicating that they are unknown and insignificant.

Abuse is aimed at two groups:
1) An unknown competitor, whose relative anonymity is highlighted even further.
2) Paradoxically, a well-known competitor whose high credibility and status is undermined in an act of defiance by pretending to regard the competitor as unknown or insignificant.

Abuse is aimed in two ways:
1) When the competitor is announced.
2) When the competitor is performing badly.

The phrase is often used in sport, particularly at football matches in the UK.

a rhetorical phrase that insinuates that the person who is being spoken to is either strange or a moron.

the person being spoken to with usualy reply with their full name but you're never actually looking for an answer, hence it being rhetorical.

One of the band "The Who"'s last songs; also found as the theme song for CSI

Mall Monkey writer Keith Smith's catch phrase. He says it frequently due to the fact that he despises going to the mall on his own time.

Originating on Cape Cod; a greeting between friends... (or enemies)... based on a line from one of Arnold Schwarzenegger's movies, taken off an internet soundboard used to prank call people w/the governator's voice. Rapidly gaining popularity wherever its original users are in college... from Florida to New England. On one legendary occasion, yours truly got Ahhnold himself to say "who ahh you!?" when the terminator was sited at Gold's Gym on the Cape.
(note: must be said with an Austrian accent)

When you are talking with some one and they say something that you did not know