Spoof is a slang term used in certain parts of the world that refers to a certain viscous liquid.
I think you might mean 'Spuff'.
A sentance I never thought I would write on HN.
It goes by many names. Spunk being another, but spoof being one too.
Sounds more similar to boofing.
Spoofing may be the act of pretending to blowing coke up someone's butt, but then "accidentally" snorting it yourself.
Samantha: Woah, easy now. It's my turn!
Dave: Alright, alright, I'll do it! [prepares straw; fakes choking, coughing]
Samantha: WTF, Dave?! Freeloading as always, now you fucking spoofed me???
I know about boofing, I learned about it during one of the more recent us supreme court confirmation hearings
not sure what spoofing would be in a sexual context, but it does sounds like something potentially illegal, or at least morally gray :D
Maybe because Spoof sounds simiar to Snuff...