The fedora worn by an unattractive guy who plays the guitar to trick girls into thinking he is hotter than he actually is. They can usually be found on the heads of annoying guys playing covers of Disney or Jack Johnson songs on college campuses.
Girl one: That guy playing "Your Body Is a Wonderland" on the quad is totally hot.
Girl two: Not really. He's just wearing a fedouche.
1. A romantic partner who has been unfaithful, shows little or no genuine remorse, and is likely to be unfaithful in the future.
2. Someone who has violated your trust and/or confidence in a horrible way.
3. The sound you make when your friend finally ends the relationship with the aforementioned fidouche.
1. How many times has he cheated on her? Two, three times? She needs to wash that fidouche out of her life.
2. I can't believe you slept with Sally when you knew I had a crush on her, you're such a fidouche.
3. Person 1:" so I was like, that's the last time you lie to me about your affairs, we're through". Person 2: "Fidouche!"