nah nah bitch
Nah nah bitch is like a loud, stupid goodbye that people use to be annoying and make others laugh.
Person 1: I'm going to eat. Person 2: Nah nah bitch. Person 1: You're so loud.
Person 1: I'm leaving the chat. Person 2: Nah nah bitch. Person 1: You're like a kid.
Person 1: I'm going to bed. Person 2: Nah nah bitch. Person 1: You're the worst ever.