Weeksy Share definition Flag One that is of a slutty nature and one that has cheated on every single one of her boyfriends. This person often has bad breath and a lack of friends. "Ahh dat butterz gal cheated on him again... " " ahh what a Weeksy! "slut butterz fugly slag sket Weeksy by SpeakTheTruth91392832 November 25, 2010 Get the Weeksy mug.