As with any other language, the speaker doesn't just need to learn sign language words but also words to express grief, disappointment, dissatisfaction, and anger. Yes, we're talking about swearing in sign language. Deaf people use swearing just as much as the rest of us - they're just able to do it a little more discreetly. YouTube channel Cut has helped us all join in on the fun by posting a video in which seven deaf people show how to say all of their favorite curse words in sign language, and it's so much more fun than just flipping the bird.