But he was ably vindicated by piddler, and the unfortunate Sam was convicted of petty larceny.
1540s, "to peddle, to work in a trifling way," of uncertain origin, apparently a frequentative form. Meaning "to pick at one's food" is from 1610s; that of "urinate" is from 1796. Related: Piddled; piddler; piddling.
[a euphemism for piss]