A combination of dead skin cells, seminal fluid and excess urine.

It's a natural process that starts during the mid-teen years. The dead skin cells are from the connective tissue that held the foreskin to the glans during childhood.

As soon as you hit your teens, this tissue breaks down which then allows you to retract your foreskin.

Smegma can be washed out with plain water. Make sure you carefully retract your foreskin. Smegma usually builds up behind the inner end of the glans (just behind the bell-shaped tissue known as the corona). Soap isn't advised for use to keep skin irritation to a minimum, especially around such a sensitive area.

In case of smegma, circumcision isn't necessary. Smegma isn't a disease or a form of fungus. Just follow the above steps.
"You have a case of smegma. Just use plain water to wash it out."
by DylRicho March 16, 2013
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Foul cheese like buildup that comes from not washing or properly maintaining equipment. It comes from NOT WASHING YOUR DISGUSTING TWAT/COCK! See egg salad.
You have smegma leaking from your pants you dirty fuckwad!
by Not so super DJ Gennady March 7, 2003
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A term which can be referred to as the cheesy substance caused from sweating of the gland. More common with people who have a foreskin or skanky dirty bastards that don't wash.
"I went to take a piss the other day and because I hadn't washed in a while my dick smelt cheesy."
by Doc December 12, 2002
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A national delicacy, this cheese is the only non dairy cheese to be matured on the human body, fermented under the rims of the bellend to achieve a nutty and occasionally fruity taste depending on the time left to age and the ageing process itself. Is commonly used as a light spread on toast, and works excellently as a tangy kick to a salad of stir fry.
Timothy, could you please allow your mother to borrow some of your smegma? I'm making a salad for the neighbors and feel as if it requires a bit of a tang.
by Confooshus September 13, 2018
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The juice and combination of cum and piss. This juice forms over time to become a solid after being left under the foreskin for too long making it smegma, a semi solid and combination of cumpiss.
Dang, that's alot of smegma joseph!
Cheers Jesus!
by Atef Lord February 19, 2021
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