Question

一饮而尽[yī yǐn ér jìn]1.■toss off the cup; Down the hatch!; drain the cup with one gulp; drink clean at one gulp; drink off [up] at [in] a [one] draft [draught]; drain the cup [glass; bowl]; drink the whole in one draft [breath]; drink up in one swallow; empty one's cup in one gulp; swallow at one gulp; take one's drink at a gulp; toss one's glass back at a gulp