bof

Etymology 1
From.

Noun

 * 1)   contagious disease

Interjection

 * 1) so what, never mind, whatever, meh

Usage notes
"Bof" is a multi-use word, akin to “meh” in English. It is commonly used before the French phrase "je ne sais pas", meaning "I don't know". For example:
 * Qu'est-ce que tu veux boire ? (What do you want to drink?)
 * Bof... Je ne sais pas. (Hmpf... I don’t know.)