A fork of Rural Dictionary
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.
Kevin: Wow, being grenaded by my girlfriend last night left my ***hole gaping!
Gerald: Eek, that sounds terrible.
Kevin: Nah dude, I loved it!
Gerald: Hmm, maybe I should try some grenading...