Thrash may refer to:

• Thrashing (computer science), where increasing resources are used to do a decreasing amount of work
• Thrash (surname)
• Thrash, mascot of the Atlanta Thrashers
• Thrash Rally, a top-down perspective rally racing video game developed by ADK
• A synonym for a strike (attack)

• Thrash metal, an extreme subgenre of heavy metal
  • Crossover thrash, a fusion of thrash metal with hardcore punk
  • Groove metal, a subgenre of heavy metal also known as post-thrash
• Thrashcore, a subgenre of hardcore punk
  • Bandana thrash, a subgenre of thrashcore
• Thrash, the nickname of British electronic musician Kris Weston
• Thrash Anthems, a 2007 compilation album released by thrash metal band Destruction
• "Thrash Unreal", a 2007 single by punk group Against Me!
• Thrash Zone, a 1989 album by the American crossover thrash band D.R.I.

• Thrash, West Virginia, former unincorporated community in Braxton County, West Virginia, United States

• Thresh (disambiguation)