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2.
Code for a sl*t or wh*re with very low morals/standards. Used when revealing a Person's true motives.
Guy 1: Hey man do you think i should hook up with that girl that's been all on me all night Guy 2: No dude, shes a total Montie, she probably has gonorrhea or crabs Guy 1: Damn your right, i just saw her she threw up on some guy..
by DAVVEEEEEE January 07, 2009
 
1.
To start one's car using a screwdriver instead of a key.
My friend had to montie into his car this morning.
by ErnieG March 08, 2006