Green’s Dictionary of Slang

(Aus.) a male homosexual.

1948		H. Morrison letter 14 May in S.J. Baker papers MLMSS 165: Box 3: [S]everal of them were having an argument as to whether Sir Lawrence Olivier were a haricot. I asked one of them for an explanation and he said, ‘It’s rhyming slang; a haricot bean is a quean’.
1963–74		B. Humphries Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 78: Who’s this haricot?