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A extremely hard to get rid of std, usually located around the scroatal area. Most men who have gay sex get a 'Matthew Robinson' around thier ass holes and on ocassion they have happen while a women pussy farts.
Man 1: 'Dude! Last night she did a Matthew Robinson on my cock'
Man 2: 'Did you like it?'
Man 1: 'No, and now my dick is the color green'
by JYork666 February 27, 2011