I'm not shitting bricks! Share definition Flag Being completely serious about what your stating. Emphasizing that you are not joking around. "I can totally get you that vacuum at 50% off, i'm not shitting bricks!!!" I'm not shitting bricks! by jimmy patron September 19, 2009 0 0 Get merch Get the I'm not shitting bricks! mug. Buy Now — $32.95 See more merch