not hold (one's) liquor(redirected from can't hold your liquor)
not hold (one's) liquor
To be greatly and negatively affected by alcohol, especially becoming ill or unconscious. I'm sorry for acting like such a fool at the party—I don't even remember what happened. I guess I just can't hold my liquor. A: "Wow, Jennifer is on her fifth pint and still seems totally sober." B: "I wonder where she learned to hold her liquor like that."