What is River Pump?
1.
The act, or effect, of exercising (push ups etc.) just before embarking on an intertube trip down the river. This temporarily enlarges your muscles, with the desired result being a more impressive appearance to the opposite sex.
Instead of tying up the raft he was on the bank working on his river pump.
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In a movie theater, masturbate quietly in your seat. Before climax, cup your hand in the shape of a silencer on the end of your penis an..
1.
a man or woman who goes to see a movie purely to pleasure themselves
dude, that guy is a one handed popcorn eater i just got jizz on my..
