look up any word, like blumpkin:
During sex when a man packs a fat lip of lady grizz (chewing tobacco) and is banging a girl from behind. When he approaches climax he starts making beeping noises like a truck in reverse, and proceeds to pull his bottom lip outward and tilting his head downward allowing the warm clump of chew to fall on the girls back.
1) Bro, i was hittin it from behind with a fat boy in and then i dump trucked a huge shwab of grizz wintergreen on her ass.

2) Dude, me and that chick banged at the party last night, but i didn't have time to take out my lipper so i had to dump truck her ass.
by Lax Bro Leroy March 15, 2011
tucking the cock and balls between the legs and proceeding to ejaculate in the female's mouth while backing up and dropping a steamy load on her chest making crazy beeping noises like a dump truck
"Beep Beep Beep," said Little Eugene as he dropped a killer deuce all over Molly and her twin sister. "Now THAT's what I call a dump truck!"
by Shadie August 23, 2006
While in the sixty nine position the individual on top slowly sits up (much like the motion of a dump trucks bed) while making a beeping sound, and proceeds to defecate on the face of his/her partner.
He pulled the dump truck on her.
by Jordan Martin September 24, 2006
Popular novel by author Clayton Bigsby
by Anonymous September 24, 2003
The act of shitting in a girls mouth while she gives you a rim job.
Bitch gave me a rim job so i decided i would return the favor with a steaming dumptruck.
by WetSocK June 15, 2004
Derogatory term for a criminal defence lawyer who accepts large numbers of clients with the intention of pleading them guilty as quickly as possible in order to make money on volume.
I wanted to challenge the charge on constitutional grounds, but my lawyer's a dump truck and sold me out to the prosecution.
by NoJusticeNoPeace April 20, 2009
v. int. The act of pushing one's face in between a persons butt cheeks, and rocking one's head side to side very rapidly while making a vigorous, lip-vibrating "brrr" sound.

n. The sound produced when performing a dumptruck.
Wouldn't you love to see Simon Cowell dumptruck Cheryl Cole?
by Westcountry Lad April 08, 2011
A trending metaphorical term to describe a specific type of large "booty". Dumptruck refers to a booty that typically exceeds the measurement of 40".
"Damn son! She didn't just have a bubble butt, she had a dumptruck!"
by K Trey August 14, 2013