Green’s Dictionary of Slang

a slatternly woman.

1924		F.J. Wilstach Sl. Dict. Stage 16: Blowser, A coarse Jane.
1944		D. Runyon Runyon à la Carte 130: She is far from beautiful. In fact, she is strictly a blouwzola.
2003		N. Green Angel of Montague Street (2004) 3: Back in the arms of some old blowser who would give him shelter.