A rare usage, deriving somewhat from a rhyming intra-syllabic-injunction and a metonymic relationship to the more 'standard' definition of 'piddle': the penis itself.
Like baby pee. Used for when others are so weak that they weaken the proper formed and spirited humans to their creepy ugly immature level by being present. An apathetic boring and weak attitude that doesn't shop or dress catlytically.
I was hung ho to finish a work out and design gymnast stirrup silverlake sandals, but then the piddle conformists showed up and I cried about being weak and ugly dressed to fit in with them.