Guesstimate !!
Guesstimate... I am not sure if that word is included in the Oxford dictionary, but if there's any word that deserves to be there, this one certainly takes the top spot. Think about it, what a wonderful word in the current IT boom scenario. Instead of using the not-so-appropriate 'estimate' any longer, we should all start using 'Guesstimate' and save our arses when someone asks us why we were not able to meet a deadline. chou now !!