When performing the act of sex while in the doggy style position and entering vaginally, use your index finger to slide in and out of her brown eye. If you realize your finger is becoming engulfed in matter of a brown nature, swing your finger up to her mouth and hook her like a fish.
Billy: I was tapping Tammy from behind and doing that thing she loves with my finger in her ass, but then I realized my finger was covered in shit.

Jim: That's fucked up. What did you do?

Billy The Rusty Fishhook.

Jim: God damn right.
by green duck butter January 25, 2012
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Similar to the shocker, but afterwards the poo-laden finger is inserted to the womans or mans(in prison) mouth in a hooked fashion.
Susan knew what her ass tasted like after I gave her a rusty fishhook.
by Anonymous May 8, 2003
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The act in which an individual first puts their index finger into an anus, covering it in fecal matter, then scrapes it along the insides of a victims mouth, causing a jagged wound that will likely become infected
Joe ran up to the man and gave him a Rusty Fishhook.
by AlphaGusterTwo July 11, 2008
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When a man eats out a woman’s booty hole, while simultaneously fingering her cooter. There are two versions of this orgasmic sexual experience: 1) Barbed (i.e., long fingernails) and 2) Barbless (i.e., clipped fingernails).
Dude! My roommate Steve gave his girlfriend a rusty fishhook last night!
by Jaques Clouseau February 14, 2019
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An action of shoving your index finger into another's rectum forming a hook and then pulling down bringing them to their knees
I haven't been able to sit down since tod gave me that rusty fishhook last night
by KillTheGestapo August 6, 2017
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