A Whiteside1. noun: having a big diameter penis. The white mans response to the long skinny black cock. The whiteside is generally muscular in appearance and can be versus a pringles can.2. adjetive: a slang term most often involving a penis of huge girth; capable of increasing vaginal circumferencesee also: pringle can, coke can, stalky stub muscle, Matthew's holy hammer A fat middle age man with an alcohol instinct, he tends to make love along with his teenage son secretly and enjoys it a lot more than making love with his wife. Just like a Peadophile however the target (son) doesn't object to to your love activities.