Someone who can drink a lot without acting drunk "holds their alcohol well." Someone who drinks only a little, but acts drunk anyway, "doesn't hold their alcohol well."

Hello Farhana Qureishi, "NOT HOLDING someone's alcohol well" means that someone gets DRUNK very easily when he drinks alcoholic beverages. and "HOLDING someone's alcohol well" means that someone does NOT look DRUNK even if he drinks alcohol.

Means getting drunk quickly

This means when the person drinks alcohol they get drunk easily and outwardly display actions like slurring speech, stumbling when walking, and making outlandish statements. Check out my teacher profile and let's improve.