Green’s Dictionary of Slang

m.b. n.

[abbr. brandname]

(Aus.) Melbourne Bitter; thus suffer from m.b., to be drunk.

[Aus]Northern Miner (Charters Towers, Qld) 28 July 1/2: [advert] EVERYBODY go there • Where? to HENDERSON'S—for a glass of M.B. Ale.
[Aus]Baker Aus. Speaks.