Fish-hooking is the act of inserting a finger or fingers of one or both hands into the mouth, nostrils or other orifices of a person, and pulling away from the centerline of the body; in most cases with the intention of pulling, tearing, or lacerating the surrounding tissue. Forceful fish-hooking involves a high risk of permanent facial or orifice damage. Sometimes, the term fish hooking refers to a type of eye gouging.
^"MMA Glossary". Retrieved March 4, 2011. "Fish Hooking – inserting fingers into the mouth, nostrils or other orifices of a person with the intention of pulling and tearing the surrounding tissue. Forceful fish-hooking involves a high risk of permanent damage to the face or orifices. Not allowed in MMA."
^E. R. Silverman. How to Kick Someone's Ass: 246 Practical But Not Always Legal Ways to Take the Bastards Down. 2010: Adams Media. p. 213. ISBN9781605506296. "WARNING! Keep your fingers hooked into his cheek and out of range of his teeth so your fingers don’t get bit, and don’t practice on your friends if you like their current facial appearance."