v. & n.
v.intr. 1 colloq. urinate (used esp. to or by children). 2 work or act in a trifling way. 3 (as piddling adj.) colloq. trivial; trifling.
n. colloq. 1 urination. 2 urine (used esp. to or by children). piddler n.
[ sense 1 prob. f. PISS + PUDDLE: sense 2 perh. f. PEDDLE ]