Don't feel stupid, I had to go find a chat room dictionary to try and understand everbody. I've been meaning to ask, what IMAO means, I think I got the letters in the correct order. It seems to be a favorite of Dennis.
IMO or IMHO is 'in my opinion' or 'in my humble opinion'. Never seen IMAO unless it was a typo. Or, you could put in whatever appropriate word you think of for the 'A'.