Zipperdoodle is a doodle on your zipper dont you know? the bird bird bird bird is the word! nah but really. Zipperdoodle is a doodle, aka drawing, on the zipper of pants/jackets/pockets/zippers! usually these "zipperdoodles" are the company logo
chipple my whipple
guy1: Dude check out my zipperdoodle!!
guy2: sorry im not gay im not goonna look down their at your smally