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When in the act of performing fellatio the penis ventures a little too deep for their partner thus resulting in them throwing up all over your sweaty cigar. The shock of this causes the receiver to faint while the giver flees weeping.
" Alan thought the blow job was going pretty well until Sarah, to his horror, had a Fellatio Upchuck "
by benji the bandit 22 March 01, 2009
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