A portmanteau of the words, "urine" and, "silencing".
The act of, when passing micturition (urine), pissing onto the inside of the toilet bowl above the waterline or against the back
wall of a
wall urinal so that the, "urine splashing into
water" sounds are totally absent.
{Husoos}:
Hey Horhay, where's Edgar? He went into that restroom a few minutes ago, but I don't hear any pissing sounds.
{Horhay}: Edgar is urincing -- that
way nobody
will hear him peeing.