transitive. To urinate in or on (one's clothing, bed, etc.), esp. involuntarily, as through fear, excitement, or amusement. Frequently reflexive…

to piss on, wet with urine.

transitive. To wet with urine; = bepiss v. at be-, prefix affix 4.

To void urine in (one's bed, clothes). to wet one's pants figurative, to become excited or upset (as if to the extent of involuntarily voiding urine).

transitive. To wet or saturate with urine.

transitive. To urinate in or on (something); to wet with urine. Cf. wet, v. 5c.