Any random substance that gets trapped in your grundle hair. These substances accumulate over time and create small,yellowish, sticky clumps. Hence the name under cheese.
by Le French Spankier Bastardo June 01, 2006

Any random substance that gets trapped in the hair located in between your ass crack and genitals. These substances build up over time and create small yellowish clumps. Hence the name under cheese.
by Le French Spankier Bastardo May 23, 2006
