The phrase comes from everyday Russian slang, where Kostya is a common short form of Konstantin and lokh is a teasing word for a sucker or loser. No widely documented film, game, or television source is attached to this short recording, and it circulates mainly as a user-shared soundboard clip. Its appeal is its directness: a named, personal insult works as an inside joke for anyone who knows a Kostya, and as a generic roast for everyone else. That combination keeps it useful in chats, gaming sessions, and short meme edits where a quick, recognisable put-down fits the moment.