Whack 

A combination of the words wh(ite) and (bl)ack". Negatively used to describe a caucasian male with an attempted attitude which resembles those of ebonic men.
See wigger and Eminem.

Hey, look at that whack white guy with his puffy jacket and baggy pants.

Whack by Ancient Knight November 11, 2003

whack 

to procrastinate and do nothing. When one engages in whacking, often girls, they may go to the bars on a monday night, movie, shopping, or just sit around and do absolutely nothing. This is a whole new meaning for the word...thanks to the KD Ladies @ SLU.

Aly: "Does anyone want to whack with me after class?"
Meg: " Sure I will. What are you giong to do?"
Aly: "Oh probably go shopping and tanning then maybe workout, I don't want to do my homework tonight."

whack by Ali April 22, 2005

Whack 

Totally out of control beyond belief

Jaci John is whack as shit!
@jaci_janemarie on twitter.

Whack by DrosFro May 13, 2011

Whack 

A combination of white and black, wh-ack.

Shaniqua was black but acted white so we were like "damnnnnnn she is WHACK!!!"

Whack by Shalonda Yomama July 19, 2007

whack 

someone who is appaling in nature or rediculous

@drosfro is so whack.

whack by IAMNOTWHACK May 9, 2011

Whack 

A white person that acts black.

Chris (white): Bro, this song is the shit!
James (black): You're prolly the only white person I know who talks like that
Chris (white): Cuz I'm black in a white dude's body!
James (black): Nah bro. You're whack

Whack by neenerdeeder September 8, 2013

whack 

The intravenous injection of a drug. Usually heroin or cocaine.

"Let's whack that sh*t as soon as we get back to the crib."

whack by smokeribs April 21, 2018