"Happy Birthday, You Old Slut!" Style No. GR40 Two Design Options! We have updated to include a newer, bolder shade of animal print : But the classic still stands. This unapologetically hilarious birthday card is for the legends with the right sense of humor — whether it's your grandma who still turns heads or your bestie who invented day-drinking. Strong feminist energy. Equal parts filthy and fabulous. Because celebrating women means letting them be wild, loud, and delightfully inappropriate.