if someone can't hold their drink, they get drunk after drinking very little alcohol.
You can't hold your drink, that's your problem. Two beers and you're under the table.
(redirected from can't hold liquor)
can't hold (one's) drink
Has a low tolerance for alcohol; becomes drunk after consuming only a small amount of alcohol. A: "Wow, how much did those two have to drink?" B: "Hardly anything—they just can't hold their drink."