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4.
<Noun> A rank punanna. Due to lack of bathing, its stench resembles that of dead fish.
"I AINT eatin' that Filet O'fish." -SDK
by Sno Bro November 19, 2003
 
1.
it's the Catholic Big Mac.
"we're having Filet-O-Fish night on Friday, cause we can't eat meat." - Mom

"YAY!" - kids
by happy chasm March 18, 2009
 
2.
A sandwich sold at McDonalds, which causes otherwise dead fish to rap about Fish Rights.
"Give me back that Filet'o Fish; give me that fish!"
by That Depends; Who Are You? April 07, 2009
 
3.
The act of finishing sex with the typical facial with a twist, when the finish comes, the hand is slid over the tip of the penis, cupping the semen as it expells and then reaching back and slapping the recipient across the face as you yell filet-o-fish
This girl was so crazy last week, I gave her the filet-o-fish and she actually enjoyed it
by Dclutch04 July 17, 2010