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1.
A car with only one working headlight. Coined by writer/actor/comedian Rich Hall. A pediddel is often mistaken for a motorbike. Recently it has become more common to spell it pediddle, as popularized by the pediddle game where you shout the word if you spot a car with one working headlight.
Hey look, here comes a pediddel!

Careful Dave, watch out for that pediddel.
by Bloopy May 22, 2008