Slang for fat/thic ass. Thought of by some horny pubescent's.
Yo, my boy kyle got into a car crash today, he hit a dump truck.
Its a cleaner version than saying the phrase dumb fuck , which describes a persons actions and persona
Tom : hey did you see that guy last night
Greg: which one , you mean the guy who made an ass of himself .
Kids walk in the room
Tom : hey kids , ya what a dump truck .
Stupid shit that comes out of someone's mouth.
Did you just hear that chick straight dump truck mouth ! Can't believe that stupid dump truck mouth hasn't gotten her beaten up yet!
For males and females, this word is meant for all.
People with a FAT juicy ass. Typically reserved for the homies.
DAMNNN brother bro, you got a dump truck on ya!
person one: dude, look at that guys ass!
person two: holy shit man! what a dump truck!