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.
she got dumps like a truck, truck, truck, guys like what, what, what
-Sisqo
By Daniela
Dumps Like A Truck
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
Yes, sir. I would say that she dumps like a truck.
Quite.
By Matilde
Dumps Like A Truck
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.