Green’s Dictionary of Slang

1. (US) pertaining to blackmail; thus skank sheet, a libellous, if accurate newsletter.

2023

(con. 1962) J. Ellroy Enchanters 146: Blackmail’s our only protection [...] It’s a heavy-duty skank deal. And skank’s the only thing that will stop Bobby [Kennedy] [ibid.] 151: It’s a private skank sheet that I sell to subscribers.

2. see skanky adj.