Tabernouche 

It's an exclamation that means "Dammit"

Holy shit? said Charbonneau.
Christ?
Tabernouche?

KATHY REICHS
DEJA DEAD

Tabernouche by p't con May 2, 2011

tabarnouche 

(French-Canadian)

Soft profanity used to emphasize an emotion, an impression. Mild version of french-canadian curse word tabarnak.

Il pleut en tabarnouche. (It's raining 'en tabarnouche'.)

C'est toi qui m'a joué un tour mon tabarnouche! (You tricked me, you tabarnouche!)

Tabarnouche qu'il fait frette chez Mario. (Tabarnouche, it's cold at Mario's.)

tabarnouche by Edgar Pruviance May 27, 2009