Yarn Chicken
Yarn chicken is a term often used in online knitting/crochet circles. It is a self-imposed 'game' in which a crafter is unsure if they have enough yarn in a skein to complete a project, but rather than going through the process of measuring and weighing to find yardage, they start the project and hope it's enough. The crafter wins the game if they finish their project with just enough or extra yarn, and they lose if they run out of yarn before completing their project.
I'm going to go pick up some yarn. I lost Yarn Chicken and I really need to get this hat done.