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2.
To "high-hat" one is 1) to scorn the individual, to demonstrate open disdain. 2) to melodramatically display lack of interest. 3) to be pompous; escpecially, to dismiss.
"Marjorie Kinnan Rawlings’ maid says the reason you were buried in an unmarked grave is you high-hatted the people of Eatonville. You were uppity."
by John Spencer Yantiss December 30, 2005
 
1.
Slang for being left out, condescended to, or otherwise being screwed out of what's rightfully yours. The "High Hat" can be either given or recieved.

Note: Checkk out the film "Millers Crossing" for colorful usage of the term.
MARK: Hey Nick, I'm going over my Uncles tonight for a birthday party so I can't hang tonight. I'll call you tomorrow.

NICK: That's awfully strange-I heard from Adrian that yer' going to see the White Stripes. You givin' me the "high hat" fucker?!
by Mike Falcigno April 22, 2004
 
3.
a rap trio from Lorne Park, Mississauga, Ontario. notable for their mischief, uncanny knack for creating controversy, and of course - the music.
The High Hats compel you to read your bible!
by brand n00bian September 01, 2006
 
4.
Used in conversation when remarking that someone thinks they are funny or are being a smart-aleck.

Taken from the sound that is made when the snare drum and high hat are hit in sequence after the punch line of a joke.
John: Hey I stopped by the house and picked up your mail. Do you want me to put in my box?

Chris: That's what she said!

John: There you go again. Always coming with the "High Hat". Cant you ever take things seriously?
by AugustJaz February 26, 2010
 
5.
At a party you shit in the hosts toilet tank that way everytime it flushes shit water comes out.
Dude1: Dude, when all those skinheads were over last weekend someone high hatted my tank.
Dude2: Thats wack yo!
by scott January 17, 2004