dar verga

A vulgar Mexican slang expression meaning to give someone a beating — dar verga a alguien is to physically beat them up. It sits in the same crude-but-common register as vergazo (a hard blow) and belongs strictly to informal, often aggressive speech, never polite or written Spanish.

• Le dieron verga por meterse donde no lo llamaban. — They beat him up for getting involved where he wasn't wanted.
• Si sigues así te van a dar verga. — If you keep that up they're going to beat you up.
• En el barrio, dar verga es sinónimo de dar una golpiza. — In the neighborhood, dar verga is synonymous with giving a beating.

This is vulgar slang built on a crude word for the male anatomy — a learner should recognize it when they hear it but avoid using it themselves outside very informal Mexican contexts, since it can read as aggressive or offensive.