Semen that has come into contact with water and turns into a cement-like substance.
I came in the shower, but I had a hell of a time washing off the sement after.
When you splooge on a girl on any part of her body and she doesnt wash it off in time. It hardens like cement and she cries because her mom sees.
I put sement on trisha's face, and she was very upset when it didn't come off in time for school the next day.
The blockage that is created by dried semen on the tip of your dick after sex.
You wake up at 3:00am to drop a line after dozing off after sex, and the urine gets blocked for a moment by the sement and then bursts out like a geyser (which kinda hurts).
to cum on a girls clothes, then the next day the girl realizes it is all white crunchy and flakey like cement.
Dried up cum or semen on ones body part.
"Dude, How was that chick last night?
"Dude she semented my face!!"
verb - the process of draining semen from ones vagina after intercourse without a condom.
After fucking my girlfriend, she had to go sement.