pronounced Shtoo-ka-brooke (with rolling Rs), word originated in Belgium and later developing into its own language (popular mainly in western Europe);
used as a response in situations that aren't worthy of being dignified with a more thought-out answer,
or to assert comraderie within a group of people.
may also be used as a recognition sound in a crowd or a dark place, and associated with other recognition mechanisms such as harsh bird sounds and words pertaining to the Stukabruke language (i.e. dubrushnikov, freetz, freeshtabruke, gr00tz, ad nauseum)
n. (from Russian) An informer. One who turns in one's friends, family, and neighbours to the secret police, usually for a reward or advantage. It is considered one of the foulest insults in the Russian language.
The Junkers Ju-87 Stuka was a divebomber that was used by the german Luftwaffe during World War II. The sirens that made sort of a screeching/whistling sound as the Stuka dived was demoralising to enemy troops on the ground. "Stuka" is short for Sturzkampfflugzeug.