Top Definition
A sexual position in which the male bends over and sticks his dick backwards between his legs and the girl backs up onto his dick while making beeping noises like a Mack Truck. Variations include the Wide Load (women in excess of 200 lbs.)
Guy: Yo my girlfriend pulled the Mack Truck yesterday. I nutted everywhere
Other Guy: Dude thats so ballin. Did you try the Alaskan pipeline after?
Guy: No I've been constipated for weeks so I didn't have any frozen shits laying around
by Cock Mob September 24, 2007

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a nose the size of a mack truck
Guy 1) Daaayyyyuuummmmmm did you see that girls nose
Guy 2) Yeah that bitch gotta macktruck
by finklethetwinkle December 08, 2009

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A guy with a huge penis.
That guy that I slept with had a Mack Truck!
by InuAngel October 06, 2006

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Have sex, shag, make love, usually with a random or macker.
Did you mack truck him?
by HeyHoHayleigh April 29, 2007

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Heavy flirting, pulling out the stops for that head-on hit-on.
Macking like your life depended on it.
Dude, she's my soulmate; I was mackin' her like a truck.
But she passed ya like a Mazda.
I know, who can resist my rollin' mack truck?
by godofapathy July 21, 2011

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Nasty, ugly, fat BITCH.
boy#1: Look at that big WFF!
boy#2: Nah man, thas a Mack Truck!
by Bryan April 15, 2005

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A vehicle that a "macker" or a "mack daddy" would drive.
Going out tonight, Ive put some turbo in my mack truck, Im gonna be parking it in some bitches garage tonight!
by Richie dc November 24, 2005

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The Urban Dictionary T-Shirt

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