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Oral sex performed on a woman. The term is believed to have originated from the extra value meal menu at McDonalds (Filet-O-Fish was the #4).
What I'd give for a cold sparks and a #4 right now!
by Baby_Sasha January 15, 2007
synonymous in the numerical bodily function sequence with farting.

all original credit to www.marriedtothesea.com
Here I sit, broken-hearted; tried to #2, but only #4.

by busaturbo December 15, 2006
a person who comes in fourth place at a skate competition and gets beat by a 9 year old
Shaun Haley
by b December 03, 2003