metchup

when a guy cums in a girl while she's on her period and the cum mixes with the period blood

synonym: pink sauce

Guy 1: "Bro have you ever made metchup before?"
Guy 2: "Yeah, I've mixed mayo and ketchup before, hbu?"
Guy 1: "I made metchup last night when I cummed in my girl and made a pink sauce with her pussy blood"