The act of sticking your index finger(s) in the dimple spot(s) on your cheek and rotating your finger(s) around. Has two (2) meanings:
(1) When accompanied by an "awww" sound the dimple twist is used to pretend to feel sorry for someone or try to embarrass or annoy them
(2) When lacking a verbal accompaniment it is used to admit wrongdoing while still feeling coy about the bad behavior
*dimple twist* Awwwww did somebody lose at a game of monopoly?
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Q: Did you leave the milk out all night?
A: *dimple twist*
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Q: Did you steal my beer?
A: *dimple twist*