The story
From double + whammy (“evil spell; curse or hex”), popularized by the American cartoonist Al Capp (1909–1979), in his classic comic strip Li’l Abner (1934–1977).
Etymology from Wiktionary, CC BY-SA 4.0.
double whammy
doub·le wham·myToday it means: A series of two events that causes adverse effects; a twofold blow or setback. Full definition →