gestapo, n. — Green’s Dictionary of Slang

gestapo n.

also gestaps

[fig. use of Ger. Geheime Staatspolizei, the Gestapo, the internal police force used by the German Nazi regime 1933–45; note WWII UK milit. use gestapo, military police]

1. (US black/Aus. Und.) the police.

1953		W. Manchester City of Anger 127: He knows more than the gestapo, which is nothing.
1968		J. Alard He who Shoots Last 207: Keep your eyes peeled for the Gestapo.
1975		L. Dills CB Slanguage 45: Gestapo: federal agents.
1980		E. Folb Runnin’ Down Some Lines 66: The characterization of the police [...] connotes such perceived attributes as [...] fascistic exercise of power (gestaps, gestapos, goon squad).

2. (US gang) a highway patrolman.

1966

‘Teen-gang Talk In Phila.’ AS XLI:1 72: gestapo, n. A highway patrolman.

3. (Aus. prison) the security section.

1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Gestapo. Security section.
1984		B. Ellem Doing Time 190: Gestapo: the prison officers in charge of security.