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1.
Used to describe the facial features of persons whose noses are precariously close to their upper lips. Due usually to one of three factors: (1) an excessively large nose, (2) an excessively large upper lip, or (3) accidents involving underage shaving.
J: I went in for the kiss and almost swallowed his nose.
Friend of J: Yo, that's cuz he's got post nasal lip.
by Just changin' September 02, 2009