Falling on the grenade 

When you're at a party and an ugly chick hits on your friend and you hit on her in order to save him.

I got STDs from falling on the grenade.

Falling on the grenade by hugachick July 3, 2009

jump grenade 

To occupy (especially through sexual activity) a hot chick's ugly friend so that your friend can score with the hot one

Hey, Kevin, you mind jumping grenade so I can hook up with the hottie in red?

jump grenade by diatribe September 27, 2002

dive on the hand grenade 

To seduce an ugly girl so that your buddy can score with her attractive friend. This expression comes from the act of war-time bravery where a soldier would sacrifice himself to save his buddies. If you're out on the prowl with a mate and he is making progress with a fox, it is his friend's duty to chat up and seduce the pretty girl's ugly friend so that your buddy is free to leave with the hotty.

Dude, tonight it's your turn to dive on the hand grenade.

dive on the hand grenade by Bradboy January 10, 2007

Unholy Hand Grenade 

The act of flatulating in small inanimate object (usually a pillow or stuffed animal) for the purpose of delivering its putrid payload to the olfactory sensors of an unsuspecting bystander.

While Cliff was passed out on the sofa I lobbed an unholy hand grenade at his face. Hilarity ensued.

Unholy Hand Grenade by JoNeBoY August 14, 2010

swedish hand grenade 

Ejaculating into a condom then tying off the end after removing said semen filled condom from the penis. The tied off condom then becomes a projectile used in urban warfare, usually thrown overhand at approaching enemy forces.

I was pounding out this chick but then her boyfriend showed up. I had to use a "Swedish Hand Grenade" just to escape.

swedish hand grenade by DON J0HNS0N July 27, 2014

Grendel Grenade

Grenade comes from the show jersey shore meaning and ugly girl. Putting grendel infront of it basically means a girl that is hideous.

1. Look at that Grendel Grenade
2. Mason is a grendel grenade.

Grendel Grenade by William A Rees January 23, 2011

Toilet Grenade 

The same unintelligent man who made kitchen gun made the amazing toilet grenade. It cleans toilets but will also entirely destroy them. You pull the pin, take off the handle, throw it in the toilet, close the lid and in five seconds you can say goodbye to your toilet and possibly your life.

But the actual definition is a giant shit, inside a toilet.

That man blew up his toilet with that new toilet grenade.

Toilet Grenade by I'm funny I swear March 24, 2021