The name combines two recognisable references: Onkel Reje, a Danish children's television character, and sus, short for suspicious and a word made famous by Among Us players calling out possible impostors. Together they turn an innocent children's character into an unlikely judge of suspicious behaviour, which is why the clip works so well as a reaction. It has mainly circulated through short meme edits and gameplay videos, where a single suspicious moment is enough to trigger the joke without further explanation.