Piss: urine.
A piss: an act of urination.
Nonsense or a trivial matter.
To urinate.
Often followed by about or around: to act or work ineffectually and wastefully.
Synonym of nibble: to pick at or toy with one's food, to eat slowly or insubstantially.
Liquid waste consisting of water, salts, and urea, which is made in the kidneys, stored in the bladder, then released through the urethra.