It's when you're having sex with a girl and you're about to climax. You pick up a feather duster and tickle her nose, making her sneeze, which causes all her muscles to contract, including her vagina. Similar to a donkey punch.
Last night I gave my wife the Mr. Belvedere.
by amikke01 November 20, 2008
To Mr. Belvedere means to excrete something that need to be cleaned up. It can be cum, shit or other bodily fluid or function.
I Mr. Belvedered myself.
by DiggerMan March 15, 2009
verb. to crap, especially in one's own pants.
Uh oh, I just Mr. Belvedered myself...
by Nannerpuss March 15, 2009