expression, noun, noun or participle which takes 'suru', intransitive verb
drinking like a fish and eating like a horse; consuming huge amounts of food and drink
A yojijukugo describing excessive eating and drinking, often in a lively or indulgent context. Can be used as a noun or with する to mean 'to eat and drink heavily'.
忘年会ではみんな鯨飲馬食していた。
At the year-end party, everyone was eating and drinking like there was no tomorrow.
彼の鯨飲馬食ぶりにはいつも驚かされる。
I'm always amazed at the way he eats and drinks to excess.