sphincter

Definition

A legitimate anatomical term for a circular muscle that controls the opening and closing of a bodily orifice, most commonly referenced in relation to digestive functions. Despite its clinical origins, it's become comedic gold due to the inherently funny nature of bodily function vocabulary.

Example Usage

The biology teacher tried to keep a straight face while explaining how the sphincter muscle works, but the class was already giggling.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=sphincter&defid=22414)

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