KUPAL

This is not such a common word.

Kupal is semen, specifically dried semen under the foreskin of the penis.

kupal
smegma

kupal
used to describe a foolish person

Ang kupal mo!
You’re such an idiot.

kupal
used to describe a nasty person

Kupal mo talaga!
You’re really so nasty.

Kumukupal ka na naman.
You’re being obnoxious again.

Kahit maraming kumukupal sa iyo, hayaan mo na lang.
Though are many who are being nasty to you, just let it be.