Someone who listens to thrash metal. Characterized by their inability to hold a job, stay in school, keep a relationship, or stay sober, and their tendency toward violence. Thrashers are commonly found in record stores, music venues, parties they're not invited to, the back of police cars, and passed out in strange places.
WARNING: Do not insult extreme music around a thrasher or risk severe injuries.
Girl: "Dara's dating some thrasher
Guy: "I don't know how some asshole gets someone like her..."
Girl: "Damn, what the hell happened to your face?!"
Guy: "Some thrasher
got drunk and fucked me up for no reason"