The nasty, sweaty, greasy amalgam that forms in a males' taint and grundle region. Akin to a cheesy smegma. The aromas can be quite breathtaking. Typically induced from heat and general uncleanliness.
I went down to suck his cock but the smell of his undergrunge was like a ripe Stilton. I had to hold my breath and not breath.
by Ben Dribblin April 26, 2017