also: くたばってしまえ
expression
drop dead!; fuck you!
Extremely strong vulgar insult, roughly equivalent to 'drop dead' or 'go to hell'. Used in heated arguments or as a curse. Dialectal (Kantō) and colloquial.
See also: くたばる
「くたばっちまえ!」と彼は怒鳴った。
"Drop dead!" he yelled.
あんな奴、くたばっちまえと思った。
I thought, to hell with that guy.