This is short for "Mouth Open, Mind Closed." It's used when dealing with people who constantly talk without listening. This trait is common amongst guidos. Customer service agents think it often when dealing with pushy, rude customers.
Dude 1: Say dude, wanna come to the party tonight?
Dude 2: I -
Dude 1 (interrupts): Great! I'll see you there!
Dude 2: But I can't go!
Dude 1: We're gonna have a great time there! That really hot blonde is gonna be there, and I'm counting on you to be my wing man!
Dude 2: Yuck, this dude is M.O.M.C.
Dude 2: I -
Dude 1 (interrupts): Great! I'll see you there!
Dude 2: But I can't go!
Dude 1: We're gonna have a great time there! That really hot blonde is gonna be there, and I'm counting on you to be my wing man!
Dude 2: Yuck, this dude is M.O.M.C.
by quamp March 20, 2014

by quamp July 21, 2003

The device that seems to be in every traffic light that holds the light green until you get there, then immediately turns the traffic light red. It then holds the light red until someone else comes along from the other direction to set it off again.
Okay, we'll make it in time if we can hit this light green. What the-- !? It suddenly turned red!? %&#$@ stoparrgh!!
by quamp November 28, 2010

by quamp June 01, 2006

The derivation of sexual pleasure via the insertation of members of the rodent family (hamsters, gerbils, mice, rats, etc.) into one's rectum.
by quamp January 08, 2006

by quamp March 24, 2007

A woman that is so beautiful that she causes men around her to achieve an erection by looking at her. (derived from the term "three appendages up.")
by quamp July 21, 2003
