ichidan verb, transitive verb
drink too much; overdrink
Used for excessive consumption of any beverage, especially alcohol. Often implies negative consequences.
昨夜は飲み過ぎて、今朝は頭が痛い。
I drank too much last night and have a headache this morning.
コーヒーを飲み過ぎると、眠れなくなるよ。
If you drink too much coffee, you won't be able to sleep.