Thrash

• Thrash (computer science), where increasing resources are used to do a decreasing amount of work
• Thrash (mascot), mascot of the Atlanta Thrashers

In music:

• Thrash metal, a subgenre of heavy metal music

*Crossover thrash, a subgenre of both hardcore punk and heavy metal music.

*Post-thrash, a subgenre of heavy metal music, also known as neo-thrash, or groove metal.

*Thrashcore, a subgenre of hardcore punk

• Thrash, the nickname of British electronic musician, record producer and remixer Kris Weston
• "Thrash" the seventh movement of Mike Oldfield's Tubular Bells 2003 album