Green’s Dictionary of Slang

Crisco v.

[proper name Crisco, a cooking oil]

(gay) to lubricate.

[US]B. Rodgers Queens’ Vernacular 99: grease any manufactured lubricant used for a tight squeeze by an anal copulator [...] crisco.
[US]L. Kramer Faggots 150: Timmy, being Crisco-ed anally by a strange hand reaching from ringside.