Green’s Dictionary of Slang

(UK black) an alcoholic; a drunkard.

1999

(con. 1979–80) A. Wheatle Brixton Rock (2004) 28: ‘What, Sharon’s mother is a ’colic?’ [...] ‘Even people who seem decent have fucked-up families.’ [Ibid.] 182: A middle-aged man [...] the worse for drink. Pedestrians kept their distance from the colic.