1. any thing or person which affects the senses negatively.

2. a process of wetting multiple fingers, forming both hands to resemble an oyster shell, and placing said "oyster shell" to another's face, while inserting both index fingers into the victim's ear canals. A.K.A. the double wet-willy.
1. What a foul oyster.

2. Andy just gave Mario another foul oyster!
by The Party Police November 21, 2007
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