1. A phrase used to underscore or conclude one's argument about someone or something. "Nuff" is a slang shortening of "enough." Hollywood as an industry is totally out of ideas. Look at the huge amount of remakes and reboots coming out each year—nuff said.

2. A phrase used to indicate agreement with what someone else has said. A: "I just don't think Don is the most reliable choice for the job. I mean, he was late almost every day this week." B: "Nuff said."