Isn’t actually a real word, Americans say it‘s german for cat.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

Stardenburdenhardenbart is originated from Germany. It has many versions, but this one can mean a lot of things for example "I love you" "hey" "look at me" "come here". Its used to get the attention of animals . And it works because its funny and has a really interesting pronouncation.

It means "Cat" in German