Mack Truck 

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

Mack Truck by Cock Mob October 7, 2007

Mack Truck 

A guy with a huge penis.

That guy that I slept with had a Mack Truck!

Mack Truck by InuAngel October 12, 2006

Mack Truck 

Nasty, ugly, fat BITCH.

boy#1: Look at that big WFF!
boy#2: Nah man, thas a Mack Truck!

Mack Truck by Bryan April 15, 2005

mack truck 

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!

mack truck by Richie dc December 28, 2005

Mack Truck 

Have sex, shag, make love, usually with a random or macker.

Did you mack truck him?

Mack Truck by HeyHoHayleigh May 12, 2007

mack truck 

The huge space between a human's two front teeth that clearly indicates braces were necessary but not entertained. Now because of the zero igknowledgement to the issue to appears like you can drive a mack truck through the space. Although not reservered for poor white trash - it usually rears it's ugly head in that neck of the woods.

Jesus I can't even speak to that dude without totally being sucked in by his mack truck.

mack truck by Amy Resetarits January 13, 2007

Mack Truck 

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?

Mack Truck by godofapathy July 21, 2011