Noun
(combat sports) A grappling position where a fighter grabs an opponent's limb and then holds on to his or her own wrist with the other hand. Used in various joint locks.
(climbing) Alternative form of figure 4
Source: en.wiktionary.orgA Figure Four damaged Finn’s knee, but didn’t stop him from hitting Coup de Grace. Source: Internet
Figure four by Flair by Io broke up the move, then tagged in. Io hit double knees on Charlotte in the corner. Source: Internet