Top Definition
One who makes a hobby of exploring and studying the cave that is surrounded by the annular muscle (i.e., the ass)and able to contract or close a bodily opening. A poostabber. A male homosexual/anal invader.
My friend Paul is a sphincter spelunker, thus he is constantly washing feces off his weener.
by Carter Jordan September 27, 2004

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The art of going deep into and exploring a persons sphincter. Derived from the word spelunking which is another name used for exploring caves.
John: "Dude did you hear Brad was hitting on my girlfriend last night?"
Kevin: "Ya I heard about that, what a tool!"
John: "Na man he is a Sphincter Spelunker."
by k3r0s1n3 July 31, 2009

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Lotsa space for your liquids.

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One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt