Top definition
The act of shitting in a persons mouth while receiving a rusty trombone.
brett: "dude, i gave that chick a rusty dumptruck last night..."

matt: "did she enjoy it?"

brett: "no...not at all, but i sure did"

by twodollarforty December 20, 2007
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2
a girl one might fuck for purely utilitarian reasons. i.e. fat and nasty, but willing.
Scott rationalized sleeping with that Rusty Dump Truck the other night because let's face it, it was late and he hadn't been laid in like a year. There was also J├Ągermeister involved.
by lostaccident August 23, 2006
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3
a girl who is very large and busted

"that girl is a rusty dump truck"
by Echoli June 28, 2006
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