a.agreeing to distract the skanky friend of the hot babe your buddy is trying to score. NOTE: should you get carried away with your good deed and end up getting on the beast, your pal is forbidden to ever speak of it.
b.a real man's legal duty.
Okay man, I'll talk to the fat one and you can get on with the hot blonde. I'll jump on the grenade for you tonight.
by spitfire May 09, 2004
While approaching a group of females with your group of friends, sacrificing your night and volunteering to hook up with the ugly one in the group so that your friends can have fun.
Tom I think its your turn to jump on the grenade.
by RC Collens November 14, 2003
to fuck an annoying girl that would otherwise be "cock-blocking" on a friend of yours
This fat fucking bitch was runnin' intereference on my boy, and I had to jump on that nasty ass grenade. Luckily, she sucked a mean dick
by biggle January 31, 2003
Hooking-up with the "not-so-good-looking" or fat friend of a hot girl that your bro is trying to score with
I had to Jump on The Grenade just so Joey could get some hot tail last night .
by LadyKiller227 August 25, 2009

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