When the pressure in your asshole reaches critical levels that no man can contain, an explosive bowel movement of gargantuan proportions jetisons all material underneath "the rocket", displacing the water in the bowl, creating a geyser of fecal matter. Best used when toilet is clogged.
The appropriate warning for such a manuvuer is to yell "Fire in the Hole!" as loud as possible to save anyone in a 50 foot radius.
Anthony: "Hey our toilet is clogged."
Alex Clark: "That's okay, I have a Rocket Plunger building up."
....
Alex Clark: "Fire in the hole!"
BOOM.
Anthony dies.
Refers to a sex position where the broad is resting on the top of her back/neck and her ass and cooter is pointed towards the sky. The man then stands over the broad, points his plunger downwards and dunks his beef into her clam. This scintillating sex position can be turned into the “Drummer Boy Plunger Dunk” by simply beating that ass like a bongo.
see the definition....if you can't figure the Plunger Dunk out then you are to stupid for sex.