Used to describe Nikki Sixx and Tommy Lee of Motley Crue or Ben Bruce and Danny Worsnop of Asking Alexandria. Similar to the phrase toxic twins applied to Steven Tyler and Joe Perry of Aerosmith.

Two individuals who are best friends or extremely close but cause chaos in each others lives. Usually used to describe two individuals in a rock/metal/punk band, and usually the lead singer and lead guitarist.
Example of terror twins and terror twin behavior:

Ben Bruce once set Danny Worsnop's favorite cowboy boots on fire because he was mad at Danny. They didn't talk for six months until Ben got drunk and confessed, and now they're back to causing trouble together.
by PunkRocker1 January 4, 2013
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the nickname given to Motley Crue's bassist, Nikki Sixx, and drummer, Tommy Lee for their execive drug use. In my opinon, just trying to rip off the Toxic Twins' M.O.
"would you rather spen a whole day with the Toxic Twins or the Terror Twins?"

"Toxic Twins, no doubt. Can't go wrong with Aerosmith"

"Actually, I think you can. I'm pretty sure that's how Steven & Joe got that nickname"

"well, the Toxic Twins are clean now"

"so are the Terror Twins. Havn't you read 'The Heroine Diaries'?"

"well, fine, the Terror Twins then!"

"you had the right answer the first time."

"fuck you!"
by Aerosmith_fan October 13, 2009
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