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The term used to tell someone that they should deposit some more petrol in the tank of thier car if you are drugged to the eyballs
Person 1 says: Hey your tank is empty, maybe you should fill er up

Person 2 hears: <mumble> fill er up
by Pottsy2 September 05, 2008
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2
When a man puts his penis into a girls anus and urinates.
She was running a little low, so I had to fill-er-up.
by manbeef November 08, 2004
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3
Another way of telling the gas station pumper to eat a fat one.
Gas Station Pumper: Ay, buddy, what you like?
Driver: Stuff it up your turban, bitch!
Gas Station Pumper: Huh? I can't hear you.
Driver: I said, "Filler up!!"
by the Little Kid June 05, 2006
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