tipsy; slightly drunk
Describes a mild state of intoxication, not heavily drunk. Often used in casual conversation.
ビール一杯で生酔いになった。
I got tipsy after just one beer.
生酔い
I went home while still slightly drunk.
Compound of 生 (nama, 'raw, fresh, unprocessed') and 酔い (yoi, 'drunkenness'). The prefix 生 here suggests a light or incomplete state of intoxication.