1. adjective Crazy; foolish; idiotic; senseless. Adapted from Yiddish meshuge . Spelled a variety of ways in English, including "meshuganah," "mashugana," or "mashuganah." I've made no secret about the fact that I think he's meshuggeneh! You want to try to smuggle that stuff past airport security? What are you, meshuggeneh?

2. noun A crazy, foolish, idiotic, or senseless person. I try not to have business dealings with a meshuggeneh like him. What do you think I am, a meshuggeneh? Of course I'll be careful!