Green’s Dictionary of Slang

Milwaukee adj.

In compounds

Milwaukee cider (n.) (also Milwaukee cologne, Milwaukee special, Milwaukee water)

(US) beer.

1915		glossary in Committee for the Adoption of the Constitution, N.Y. (State) in PADS (1952) 65: Nicknames for beer: suds/brew/Milwaukee cider/Dutch milk.
1919		A. Baer Two & Three 18 May [synd. col.] What’s going to become of the married men—singled [sic] men baseball game with the old keg of Milwaukee cologne parked at third base.
1950		WELS [DARE].

Milwaukee goitre (n.)

(US) a beer belly.

1941		P. Kendall Army and Navy Sl. 9: Milwaukee goitre — obesity at the waistline.
c.1943		‘Bill O. Lading’ You Chirped a Chinful!! n.p.: Milwaukee goitre: Obesity at the waistline.
1950		WELS [DARE].
1967–70		IN DARE.
1992		G. Wolff ‘Waterway’ in A Day at the Beach (1992) 228: A fine full belly of the sort termed ‘Milwaukee goiter’.