Ya know, the words you say instead...
Mine are really boring. I say darn and shoot. The most colorful one is "ace", but I didn't know it was a substitute cuss word until my youngest son thought that it was a real cuss word and wanted to know why someone was on American Idol with the name of a bad word. I finally got him to say Ace.

Eventually I figured out why he thought that...when I'm driving I say, "way to go, ace!" or "out of my way, ace".
My sister says "son of a biscuit eater", which makes me giggle.
So help me spice up my vocabulary.