The spit-roast is a variation of double penetration, whereby a person is penetrated in the rear by one penis (either in the vagina or anus) and performs oral sex on another penis. This sexual act combines both the doggy style position with fellatio; the “spit-roast” is frequently depicted within pornography.
From Wikipedia - Double Penetration:
“No, it’s drinking slang like boofing and the devil’s triangle!”
-Kavanaugh, who cried his way onto the US Supreme Court