Compound of やり (yari, “stem of verb yaru, "to fuck or put out"”) + ちん (chin), from ちんちん (chin-chin, “pee-pee, wee-wee”). Derived from yariman.
やりちん (romaji yarichin)
- (slang) a sexually promiscuous man, a playboy. Not considered pejorative, it is used as a comic comparison to yariman.