noun
Derogatory term for a contemptible person; strong vulgar insult.
あのくそったれがまた嘘をついた。
That bastard lied again.
noun which may take the genitive case particle 'no', na-adjective
Used as an intensifier before nouns, similar to English 'fucking' or 'damned'; very vulgar.
くそったれな雨のせいで試合が中止になった。
The damned rain caused the game to be canceled.