and what 

It can mean so what. It is like saying I told you so. It is proving somebody wrong.

My brother: you can't get off that phone in a half an hour. Me: I got off in 10 min. AND WHAT !!!

and what by Dennis September 28, 2004

and what 

A term commonly used after a successful comeback.

Guy "Thats not what your mother said to me last night!"

-Short pause for comeback, if no comeback, you then precede to say...

Guy "AND WHAT!"

and what by Costeenius November 28, 2009

and what 

Roughly equates to "so what". Can also mean absolutely nothing, depending on the context.

Context usually found in England, or at least London, is during the build-up to a fight in order to start something.

And what? You startin? And what?

and what by Someone else March 23, 2005

and what 

A filler phrase that's short for "and whatnot," which is/can be used as an ending to a sentence or s statement.

This can also mean and shit, and stuff, and all that shit, etc.

We just coolin' out and what.

and what by Mr. Terrence L. Trezvant May 12, 2007

And What 

Normally used when telling others where you rep/are from
Also is used agressively before fights or to big up where your crew or hometown as if to say
"Yeah im from London, and what are you gonna do about it?"

E.G
Person 1: where do you rep then ?
Person 2: London And What!!

Crew 1: (Crew name) An wot!! Brap!!

And What by Tuley July 5, 2007

and what 

Short for 'And what are you going to do about it'

ME: i don't like you
Stupid head: and what?
ME: and ... you better back off before your
nose and your eyes become one of the same

and what by broder October 28, 2005

and what 

A phrase a certain race uses as an excuse for a good comeback.

Me: You're so ghetto, you use extention cords running from your neighbors house to your trailor.
Dumbass: And what?!

and what by Richy Rich May 13, 2005