From Sisqo's own mouth... “What I was really referring to was ― a dump truck when it backs up, it’s like, ‘beep, beep beep.’ So, ‘she had dumps like a dump truck’ is, like, when girls do a booty dance move and they look back at their butt. She’s like a dump truck back-back-backing it up.”

This was stated in an interview with HuffPost back in 2016.
Man, see that girl over there? She's got dumps like a truck!
by Charbonne December 16, 2017
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she got dumps like a truck, truck, truck, guys like what, what, what
-Sisqo
by Tiff April 10, 2004
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A large booty. From dump truck: a vehicle with a large area for hauling things. It's just the woman-car metaphor with another twist. see junk in the trunk, badonkadonk
That girl got dumps like a truck, yo!
by fizzle March 25, 2004
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(v.) Refers to a large poop, usually from a female.
Cornelius, did you happen to witness the massive log that Mrs. Jones excreted from her rectum?

Yes, sir. I would say that she dumps like a truck.

Quite.
by Nick April 14, 2004
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A term used to describe a woman with a large posterior. Mostly used for women whose posteriors are so large that it appears they have taken a dump in their pants.
Damn, that girl's got dumps like a truck
by jkap1000 December 8, 2009
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An analogy used to describe people, usually larger ones, who excrimate their feces in a manner resembling a dumptruck dumping it's load.
Man, that fat old b1tch dumps like a truck
by Mike Lofthouse April 13, 2004
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