One of the words that drives me completely insane when used is: irregardless. Well, that is interesting. The spell checker even accepts this word as being spelled correctly even though it doesn't exist. It is utterly amazing to me how many words are added to our acceptable language on a daily basis. Someone, somewhere hears someone else use a word completely out of context and decides that it's cool, so they emulate that person by continuing to use the word. I find it unacceptable.