Top Definition
Sometimes known as MP. A penis that when erect is longer than 9" and has a circumference of no less than 7" (diameter of slightly more than 2"). Prolonged sexual intercourse with such an MP will likely cause vagina pain that lasts at least a week. This is not to be confused with miniscule penis, as it is the polar opposite.
Ruby: So, how was your night last night?

Candy: Great, but my vagina hurts because I had sex with a monster penis. I can't even sit down, laugh, or sneeze without discomfort.

Ruby: I hate when that happens. Damn, men and their MPs.
by Ruby569 January 21, 2011
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×