Definition of piddles:
(v) :
(UK, Australia, South Africa, Namibia, euphemistic slang, intransitive or reflexive) To urinate.
(n) :
(British, Australia, euphemistic slang) Piss: urine.
(n) :
(British, Australia, euphemistic slang) A piss: an act of urination.
(v) :
(intransitive) Often followed by about or around: to act or work ineffectually and wastefully.
(n) :
(British, figurative) Nonsense or a trivial matter.
(v) :
(intransitive, now Southern US, often with 'with') Synonym of nibble: to pick at or toy with one's food, to eat slowly or insubstantially.