gabu-gabu
Drinking large amounts in a rough, unrestrained way — chugging water or drinking beer freely at a party.
💡Drinking beer at a party — 'He was gabu-gabu drinking all night!'
ビールをがぶがぶ飲んだ。
He gabu-gabu drank the beer.
At the party, they were ___ drinking beer nonstop.
パーティーでビールを○○飲んだ。