A rumper is the act of fucking the asscrack of your girlfriend and cumming on the crack without penetration into the asshole or pussyhole.
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To receive a blowjob while taking a shit.
My girl gave me a rumper this morning.
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A term referring to a colon and or anus.
Dude, I would totally stick it in her rumper.
The rear end of a shapely woman.
She fell on her rumper bumper and suffered no damage.
Where a guy name Zackary Schmidt sticks his arm in another mans ass... Elbow first.
Both: Rock, Paper, Scissors!
Zack: Well, I guess you get it first.
Man: *Sigh* I lose every time.
Zack: I guess I'm Rainbow Rumper again.
Having sex in a casual or non committal way.
Dude, me and Robyn did the Rumper Bumper last night!
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Taking a shit in the toilet system then flushing it causeing the water to come out brown.
Taking a shit in the toilet system then flushing it causeing the water to come out brown. and that is a rumper dumper