fiz·gig \ˈfizˌgig\noun (-s) Etymology: alteration of earlier fisgig, perhaps from fise flatus (from Middle English) + gig (girl); akin to Middle English fist flatus — more at feist 1.archaic: a gadding flirting girl or woman 2.: a firework of damp powder that fizzes or hisses when it explodes 3.: whirligig 1 4.: fishgig