Tinking is the process of un-knitting (tink = knit backwards). This is something that is done when one has made one (or more) mistakes. Sometimes, you catch your mistake pretty quickly, and you only need to tink a few stitches. Other times, you don’t catch the mistake until you’ve made a decent amount of progress. When that happens, you have a few choices: 1) tink back to the mistake; 2) pull your needles out and carefully rip back your stitches to the mistake, and then re-insert the needles; or, 3) throw your project across the room and find a good stiff drink.