Green’s Dictionary of Slang

1. tears.

c.1790

‘De Kilmainham Minit’ in Luke Caffrey’s Gost 7: We saw de poor Fellow was funking; /De Drizzle stole down from his Eye, / Tho’ we taut he had got better Spunk in.

2. (US) nonsense, empty chatter.

1928

M.C. Sharpe Chicago May (1929) 95: At the police station, the dicks gave me the usual drizzle about my landlady squawking, but I only laughed at them.

3. (US campus) a weakling, a whinger; thus drizzly adj.

1952		N.Y. Daily News 26 Aug. 11c: Rain can turn the sharpest dressed drooly dream boat into a drizzly drip from the knees down [W&F].
1960, 1975		Wentworth & Flexner DAS.