The remnants of a horrible anal eruption, usually found on the back of the afflicted one's underwear.
"I found some corn lodged deep in the fudge smudge that was left after I farted. Very queer I say, very queer indeed."
by Colonel Turdburglar August 25, 2005
1 more definition
the little browish tint on the tip of your dick after ass bangin your girlfriend/boyfriend
Man when I turned on the lite after ass bangin Karen last nite I had a massive fudge smudge!!!
by vinny125125 January 19, 2011