Webster's Revised Unabridged Dictionary · 1913

Piddle

Piddle , intransitive verb

[Compare dial. Swedish pittla to keep picking at, Swedish peta to pick.]

1.
To deal in trifles; to concern one's self with trivial matters rather than with those that are important. — Ascham
2.
To be squeamishly nice about one's food. — Swift
3.
To urinate; -- child's word.