YUF stands for “You Ungrateful F*ck” — a comedy and apparel brand built around one idea: everyone knows a YUF. It’s not an insult aimed at a person’s identity — it’s a label that fits a moment of everyday, harmless ingratitude. The comedic premise is recognition, not cruelty: we’ve all been the YUF, we’ve all called out a YUF, and the joke works because it’s true.