thrashsexual Share definition Flag Your sexual orientation when you get a boner from listening to Slayer or watching old Metallica live shows. I knew I was thrashsexual when I finished watching Metallica's Live Shit: Binge & Purge thrashsexual by Clifford Lee Burton February 15, 2009 0 0 Get merch Get the thrashsexual mug. Buy Now — $32.95 See more merch