from Wiktionary, Creative Commons Attribution/Share-Alike License.
superlativeform of thrashy: most thrashy.
Sorry, no etymologies found.
It's certainly capable of turning even sanguine Stockholm citizens into some of the world's thrashiest spastics.
Freed of its contract with RCA, Anti-Flag signed to SideOneDummy and released "The People or the Gun," its best and thrashiest punk rock record in years.
Even on "To the Rats," which front man Matt Heafy introduced as "the thrashiest song of the set," Trivium's technical prowess was more impressive than the song's violent breakdowns.
"Reap What You Sow" and "Cutter," meanwhile, stand as Converge's thrashiest numbers to date, giving Megadeth's Dave Mustaine a run for his peace money.
At my thrashiest, moshiest point in my music fandom, I was still a sucker for “Can’t Get It Out of My Head.”