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21.
The grabbing of both of a female's breasts or ass cheeks at the same time.
I just gave Lizzy a double whammy!
by Shaggy January 01, 2004
 
1.
a two part difficulty, a dual disadvantage
The high cost of health care and his lack of medical insurance was a double whammy.
by Light Joker June 19, 2005
 
2.
When a girl gets fucked by two (2) guys.
Guy#1: So we're really going to settle this bet by whoever can get that girl first tonight bro ?

Guy#2: Yes , it's just to see who's the smoothest....and no ties ! No double whammy !

Guy#1: Double what !?
by Mellow fellow69 December 02, 2013
 
3.
When there is two waves in one go. They both come at the exact same time and hit you twice as hard.
Woah, that was a double whammy!
by Ademma January 03, 2008
 
4.
when 2 bad things happen. usually its something bad, then something worse to make things even more f'd up.
bob -- DUDE I just got fired!! and I think I just got shot in the foot!

tim -- double whammy!
by ttttttttravis February 08, 2007
 
5.
When you stick up both of your middle fingers. Created by Ricky from the tv show Trailer Park Boys
"(sticks up both middle fingers) Now this is the double whammy i only bring this out for special occasions" - Ricky
by thereallb December 12, 2013
 
6.
Verb (v.); Punching oneself in the testicals whilst cumming/having an orgasm.

Adjective (adj.); A way to describe someone that is sexually attractive but at the same time bad for you financially, personaly, etc.
When used as a verb: "I think I might double-whammy when I jack off today."
When used as an adjective: "Damn that hoe is a double-whammy!"
by Mr. Person guy thingy September 21, 2013
 
7.
fucking things up in both holes.
"i wanna double whammy that girl" or "i just double whammied my midterm"
by twowrongsdontmakearight February 19, 2010