Biting

Illegal attacks are mainly used by heel wrestlers and are usually an offense punishable by disqualification, though typically done when the referee is disabled or otherwise distracted. The most well-known illegal moves are ones that attack the groin of a wrestler.

Description
The wrestler seizes a body part of the opponent and bites down with their teeth. Biting is often used when a wrestler is "trapped", either in a corner of the ring or in a submission hold, as a desperation move.