bleed the monkey
verb1
Government, Military, Naval, Navy, Politics, War Slang Synonym of suck the monkey (“to surreptitiously drink alcohol from a cask through an inserted tube”).
- He invented the 'monkey fist' — a knot which gives weight to a heaving line; the union plate he called a 'monkey face' and, in times of merrymaking, he frequently 'bled the monkey' to get his grog.1969, Lookout: Annual report issue, volumes 60-62: