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Are you quite sure 'dissapointed' isn't a completely different word with a completely different meaning to 'disappointed'? ....just checked it in the urban dictionary - I think you'll like this definition particularly in the PO queue! 1.sexistential dissapointment when one pines after another and after much effort finally has intercourse, only to be dissapointed by the reality in comparision to the fantasy.
e.g. dude, i have been trying to nail that girl for so long, and finally we hit it last night, and man total sexistential dissapointment.
On the tv screen that advertises their products as you queue in the branch (and queue). One of the little vignettes has the end line 'So you won't be dissapointed'. Well! I was very disappointed in the fact that it must have gone through so many different echelons before it was sent out to all the branches and no one spotted it...