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
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another name for derek shepherds phat ass
"Have you seen the new episode of greys?" "Yeah, my favorite part was seeing that mcdreamy dumptruck plastered on my screen"
by omfgmerder April 17, 2021
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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 8, 2011
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A slutty or ugly girl, who after a long night of sex, proceeds to take a shit on you in your sleep.
"Wow man, I woke up to a hot one on my chest, you didn't tell me she was a dumptrucker."
by Dylan Control February 15, 2006
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