すんなよ

don't …

→ 為る
phrase Uncommon #19,580
don't … A very informal, blunt contraction of するなよ, used to tell someone not to do something. It can sound scolding, though it may also express concern, as in 無理すんなよ (don't overdo it).
JA: 無理すんなよ。
EN: Don't overdo it.

くだらない質問すんなよ。

Don’t ask such stupid questions.

言い訳ばっかすんなよ。

Quit making excuses all the time.

くよくよすんなよな

Don’t dwell on it.

— AKIRA (1988)

くだらないことで喧嘩すんなよ。

Don't fight over something so stupid.

何もすんなよ?

Don't do anything, got it?

— ブエノスアイレス (1997)

無理すんなよ

Don't overdo it.

— フォーリング・ダウン (1993)

知ったかぶりすんなよ。

Don’t pretend you know it all.

そんなことでイライラすんなよ。

Don’t get worked up over something like that.

そんな悲しい顔すんなよ

Don't look so sad.

— Tampopo (1985)

何だよお前遠慮すんなよ

Come on, don’t hold back.

— 万引き家族 (2018)