たたきのめしちゃダメ
tatakinomeshicha dame

Godan Verb (su)

A casual prohibition ("not allowed to...") of 叩きのめす

1. Don't beat [him/her/it] up.; Don't knock [him/her/it] down.; Don't defeat [him/her/it] easily.

Casual Register
Prohibition
Colloquial