Sig Figs Share definition Flag Significant Figures, a concentrated method of torture for forgetful chemistry students. Sig Figs are usually encountered alongside the expression "Fuckin' Sig Figs." Also known as Sig Fags. Student 1: "Hey man. How'd you do on the test?" Student 2: "I got a 68. Fuckin' Sig Figs." Sig Figs by Arthquel January 16, 2009 0 0 Get merch