subs. (colloquial).A heavy rain. See SOAK.
185161. H. MAYHEW, London Labour and the London Poor, I. 314. Well, sir, suppose its a SOAKER in the morning then, may be, after all, it comes out a fine day.
1883. GREENWOOD, Tag, Rag, & Co., From London to York. That countryman was right when he prognosticated a SOAKER.