Bouef isn't exactly an insult, it's more like the verbal equivalent of the Famous French Shrug.
FFS. No emoticon, so just use <FFS>. Or I guess it could be ^8^
I was in Rennes once with a mixed group of French and Americans. At dinner, one of the American women asked a French woman about the French speaking technique of running words together. She was using "je ne sais pas" as an example. Said quickly, it sounds like one word. The American woman asked, "so how do you say 'je ne sais pas'?" The French woman replied, "I don't; I just go <FFS>"
Be the ball, Danny.