1 definition by silasmeister

Top Definition
The triceps; they are the muscles that a man uses to support himself while having sex in the missionary position.
Oh man, I was on top of Renee for two hours last night and now my missionary muscles are killing me.
by silasmeister May 02, 2010
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.