A word used to describe a person who is entirely too eager to cut, or shank someone. Usually a small female, but occasionally a gay male, this person always has a knife or a razor blade (or some sharp thing) on their persona, and may often be seen playing with such weapons as if they were toys. Also, a shanklin may appear to thoroughly enjoy cutting or tearing random objects into small pieces, thus being scissor happy.
"Did she pull her knife out again? God, she is such a SHANKLIN!"
"There goes that bladed bitch; her SHANKLIN ass is about to cut some damn body already!"
"Nah, bruh, don't fuck with that fag. He quick to act like a SHANKLIN!"