A white crusty substanace that forms all on and around the penis when a man hasn't washed it after sex or at all in a long time

bacterial growth under an uncircumsised penis which isn't cleaned regularly, it looks like little pieces of cottage cheese under the foreskin, and it stinks.

also known as smegma

a.k.a. smegma. forms under the foreskin of an uncircumcised penis when it has not been cleaned regularly. It is essentially dead/molting skin resulting from the foreskin keeping the glans penis moist.

usually found dripping from the end of a filthy penis or salivating from a dickhead

When a person (usually a man) procrastinates the duty of cleaning his penis and white goo forms on the head. Usually disgusting, although some females find it attractive. (And tasty)

Also, French people occasionally add it as a spread on a fresh baguette and treat it as a delicacy. Apparently it tastes sort of tangy, with a smell mixed with semen and original chap stick.

Smegma
a white looking dirt that builds up around the foreskin of your penis when it is left unwashed

the cheesy crud that builds up under ones foreskin when they have not washed under it for months on end