What is Rusty Fishhook?
1.
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.
2.
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.
See