chili whack 

verb. To strike or slap someone in the face with your penis.

The porn star was so notorious for slapping girls in the face with his erect penis that the chili whack soon became his signature move.

chili whack by The Real Ultimate Authority January 7, 2008

Talking Whack 

Two or more individuals engaged in robust and active dialogue about something or things that intentionally make absolutely no sense. In most cases, involves men under the age of 30 or women of any age after two or more glasses of wine.

Jim and Bob spent the entire dinner amusing themselves by talking whack which initially confused and ultimately annoyed their dates.

Talking Whack by Sandman61 July 14, 2010

full whack 

Fully turned on, all the way, etc. Can also mean full price/rate. Synonymous with "top whack" or "full tilt."

Put your burner on full whack to get your pan really hot.

full whack by laternater July 12, 2010

medium whack 

Medium whack (and other variations) is used to describe something as being whack, but to also to emphasize a lack of interest in the subject. So, it’s essentially the same thing as “whack”, but you add the “medium” part to 1.) Be redundant for no reason and 2.) Indicate feelings of indifference towards the subject, i.e. “It’s whack and I’m already bored of talking about it”.

Example: “How was the bar last night?” “Medium whack, dude. Way too many hipsters dancing to weird music. I should’ve stayed home and watched Netflix.”

Other potential uses…
Medium Funny: “How was ‘The Hangover 2’?”, “I guess it was medium funny.”

Medium Cool: “How was the party in uptown?”, “It was medium cool, I guess…”

medium whack by Crazy Joe Dude March 24, 2013

rip a whack 

To start a large quantity of something.

"I'm going to rip a whack of new servers today."

rip a whack by SuperStankbot August 26, 2009

wake and whack 

When you whack off right after waking up in the morning. A wake and whack session usually occurs right after one awakes in the middle of an erotic dream or when one wakes with with morning wood.

Dude: I arose with a gnarly case of morning wood so I had to wake and whack!

Dude's Homie: Way to start the day off on the right hand!

wake and whack by fallenaway December 16, 2008

that shits whack 

A phrase used to descrbe an object or action which is out of the ordinary.

Guy1: Hey look at my stupid ugly car!
Guy2: No way, that shits whack!!!

that shits whack by Michael' Bob Zancob June 27, 2004