There are many slang terms for a heavy rain, including one suggestion from a caller: “pumpkin floater”. This is part of a complete episode.
The Dictionary of American Regional English offers these alternative words for doughnut: friedcake, twister, floater, sinker, finger, and chokerhole. This is part of a complete episode.
horse tooth floater n.— «Doc Ellers was very pleased, as he presented me with a set of old horse teeth floaters. He told me they worked much better than the new contraptions. He was eighty.» —by Re`al “Buill” Oney My...
n.— «The fee for an occupational license is as follows:…Tooth Floater $75.» —“Texas—Proposed—Racing Commission—16 TAC 311″ RegAlert Feb. 20, 2004. (source: Double-Tongued Dictionary)