bumfuzz
the little balls of fuzz that you get inbetween your buttcheeks, usually bluish in color despite the color of the underwear you've been wearing.
"I was washing my butt in the shower the other day, and I found a little bit of bumfuzz tucked inbetween my cheeks."
Bumfuzz
Bumfuzz is the light thin hairs on a baby's ass and can also describe the sparse, chin hair that some people call their beard.
"Henry tries to grow a beard, but it only looks like bumfuzz."