やめんか

stop it!

→ やめる
phrase Rare #27,459
stop it! An emphatic, colloquial command; it can sound rough or scolding.
JA: そんなことはやめんか!
EN: Stop doing that!

双方ともやめんか

Both of you, cut it out.

— AKIRA (1988)

やめんか!

Stop it!

— 預言者 (2009)

やめんか

Cut it out!

— AKIRA (1988)