The phrase is in Czech, with 'čurák' being a strongly vulgar insult, which explains why the clip circulates mainly as an in-joke roast rather than a general reaction. Its appeal comes from how specific it is: it names Dejv directly, so it works best among friends who know the person or use the name as a running gag. Short insult call-outs like this spread on soundboards because they are easy to trigger mid-conversation, instantly change the tone of a chat, and need no setup or context to land.