expression, i-adjective
weak drinker; can't hold one's liquor; easily gets drunk
Describes a person who gets drunk easily or cannot drink much alcohol. Often used to decline drinks or explain one's low tolerance.
私は酒に弱いので、すぐ顔が赤くなります。
I'm a lightweight, so my face turns red right away.
彼は酒に弱くて、ビール一杯で
He can't hold his liquor and gets drunk on just one beer.