1)In porn movies, an asshole (anus) that can contract and expand after anal sex, digital or mechanical insertion. "Forcing semen out of the asshole after an internal anal ejaculation are what winkers do best."
An attribute displayed by a psychotic individual, who, depsite immediate appearances, has no game. The winking cannot be controlled, and becomes a trademark for the individual. With enough time spent conversing with a Winker, their manipulative, lying, and psychotic habits become crystal clear, and begin to creep you out.
(insert name here) told me he was in love with me, and THAAAAT's why he was acting so crazy and OCD-ish. What a winker!