Top Definition
The act of placing another mans boxers on one's face while masturbating, obligatory extras include listening to heavy metal while masturbating, headbanging, wearing nothing but a pair of mismatching socks and making a strange noise.
Guy 1: 'Man, I just finished smegmasking, brutal'
Guy 2: 'That's what all that noise was... wait, whose boxers did you use?'
by smegmasker August 05, 2008
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