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1. A variable sized syringe used to pump substances into and out of the anus. May include coffee, tobacco smoke, strawberry paste, febreze, etc.

2. A derogatory term usable as a noun, verb, adjective, etc.
Ryan, clyster in hand, looked around the room for opportunities.

Shit, look at the size of that thing, we could clyster a bear with it!

Stop being such a clyster, you douche fountain
by TheBSharps September 11, 2007
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