expression, godan verb (-ru)
Kansai dialect expression for staring or glaring at someone, often with a confrontational or intimidating nuance. Used in rough or streetwise contexts.
あの兄ちゃん、こっちをメンチ切ってるで。
That guy over there is glaring at us.
メンチ切られたら、メンチ切り返
If someone glares at me, I'll glare right back.