Yiddish מישעגאָסס (mishegoss), from משוגע (meshuge), “crazy”, from Hebrew משוגע (meshugga`), “crazy”, from שׁוּגַּע (shugga‘) (“be driven mad”), שִׁיגַּע (shigga‘) (“drive mad”).
Compare Russian мишигас (mishigas).
- (slang) Madness; silliness.
2007 February 11, William Safire, “Culpa for Mayor”, New York Times:
- On the contrary, the Michigander’s mishegoss is driven by my choice of the on-guard anticipate when he thinks I should have used the more general, all-purpose verb expect.