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1.
When a girl is sucking a guy's dick and he randomly nuts on her face and yells SURPRISE!
"Dude I totally gave that chick a nut surprise last night."
by Aimee & Bill March 20, 2008
 
2.
When a girl is sucking a guys dick and he randomly nuts on her face then yells surprise!
"Dude I totally gave that chick a nut surprise last night!"
by Bill & Aimee March 18, 2008