The balls that form on your sweater after washing it when the instructions say dry clean only.
I can't wear this! Look at all the noop there is now! I shouldn't have washed it.
Look who cares if there is noop on your sweater? It is the cool look these days dude.
I just spent 20 minutes cutting the noop off my sweater and now the yarn is unraveling. Just like my life!