To suck the monkey; to suck or draw wine, or any other liquor, privately out of a cask, by means of a straw, or small tube. Monkey's allowance; more kicks than halfpence. Who put that monkey on horseback without tying his legs? vulgar wit on a bad horseman.
MONKEY
Meaning of MONKEY in English
Slang English vocab. Английский сленговый словарь. 2012