1 definition by Jeff3

Top Definition
The act of having your testicles slammed by your partners thighs while he is violently climaxing behind you.
I'm still swollen from being kmac-ed the other night.
by Jeff3 August 10, 2012
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.