An awesome wrestling move. It involves going for a double leg takedown, but instead of putting your head at their beltline you put it under them and then lift up. With them on your shoulders and holding their legs, then you let the legs go forcing them to fall to the ground, similar to a dump trucks bucket.

to get a lot more than you pay for or expect due to the kindness of someone else looking out for you.

ones ass/vagina after a man has drop his load inside. Cumming inside a women instead of pulling out results in a women having a "dumptruck booty".

When you fuck a girl with a dildo while she taking a shit

Big Red Dumptruck: when a morbidly obese man with a small penis gets a blowjob on his 16th anniversary and
lays back, has his lady suck one nut deep in her mouth and have her stroke that short shaft while sucking that ball and when you finish, you yell "BigDaddy"

Perform Anal sex with a girl. Then while she spreads her ass cheaks you shit inside her asshole

A man who's ass is just massive. So large that his fellow coworkers call him "Daddy Dumptruck", no matter the situation, and no matter who is around.