When someone regularly has a sudden loud outburst of unexplained obscene words or socially inappropriate and derogatory remarks accompanying an orgasm.
Jane: Oh, baby I'm going to cum!
Dick:Me too. FUCK, SHIT, DAMN, BITCH, MOTHER FUCKER, OH FUCK!
Later that day:
Betty: Jane, how was your night with Dick?
Jane: I'm never seeing him again, he has sexual onset Tourette's!