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A ringlike muscle that normally maintains constriction of a body passage or orifice and that relaxes as required by normal physiological functioning.
I cant think of an examplefor the word sphincter.
by mastershake211 March 04, 2006
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12
Circular muscle in the anus; can be developed in gay anal sex receivers to clamp down on the penis and give pleasure to the giver, often making them ejaculate, depending on the skill of the receiver.
Peter Goesinya always like to fuck Chuck because Chuck's sphincter muscle had been well trained and was always used at just the right time.
by Richard Black April 12, 2005
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What people sometmes scream while attacking their friends from behind, shoving their fingers in their friends buttholes.
dude, i totally sphinctered eoin to kingdom-come
by The Numba One Solja October 29, 2006
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