over my dead body

Prepositional phrase

excessive idiomatic usually

(idiomatic, usually hyperbolic) Under no circumstances; absolutely not.

Japanese Meaning

いかなる状況でも決してそれを認めない、決して譲らない / 絶対に受け入れない、無条件に反対である

If you plan to sell Grandma's piano, that's over my dead body.

もし祖母のピアノを売るつもりなら、断じて許しません。

Sense（1）

(idiomatic, usually hyperbolic) Under no circumstances; absolutely not.

"Can I get a new sports car?" "Over my dead body!"