When you're in the shower and you have to poop—Instead of getting out, you poop in your hand, pull back the shower curtain, and toss it in the toilet.

The act of shoving one's grenade-resembling hand into a man or woman's orifice and then opening it with fingers flailing wildly in a mock explosion.

The real name for the Call of Duty series. The only people who don't acknowledge this as the series' actual name are the hardcore fans, who protect their sacred game above all else, and are ignorant to reason.

The solitary ugly girl always found with a group of hotties. If the grenade doesn't get any action, then neither does anyone else.

The ugliest girl in a group of girls that are out. Her friends will not even think of leaving her unless they know she is getting action herself. Therefore, someone in your group of friends sacrifies himself by hooking up with the grenade in order for the rest to have a chance of having sex with the hot girls. More often than not, the grenade jumper gets laid and the rest end up jacking off.

This waste of (a vast amount of) skin realized in the 6th grade that she will die alone after welfare and multiple heart attacks. After this harsh realization, she desperately attempted to form friendships with attractive girls for the sole reason of leeching of their hotness. Ten years later, she's managed to hold together her parasitic friendship with these girls. When you and your buddies approach these girls, the grenade's callousness from years of fat jokes kicks into overdrive, and she does everything in her power to keep her "friends" from hooking up. The grenade will most likely have to be jumped on (read: get taken back to her place and spend many long hours trying not to vomit from disgust) by you or one of your buddies (probably whoever gets the short straw).

A group of ugly, fat, pale, repulsive, and/or slovenly females.

The term "grenade" was coined by The Situation on MTV's infamous show, The Jersey Shore