Green’s Dictionary of Slang

1. worn out, broken, exhausted.

1989		P. Munro Sl. U. 191: My suede shoes were thrashed after I wore them in the rain.
1994		J. Wambaugh Finnegan’s Week 275: These babes are thrashed. I’d rather get cranked and jack off.

2. drunk, intoxicated by a drug.

1987		Eble Campus Sl. Oct.
1989		P. Munro Sl. U. 191: After eight beers he was totally thrashed.