Viacheslav Valerievich Datsik (Russian: ???????´? ????´?????? ??´???, IPA: [v??t??'slaf 'dats?k]; born February 13, 1977 in Slantsy) is a Russian former kickboxer and mixed martial artist.
Since retiring from competition, Datsik has also become notable both for his criminal behavior, and vigilante raids on brothels.