Looking for the official spelling?
Forget about it.
Consensus is definitely for "fuhgeddaboudit." But at least
53 different spellings can be found on the web. As of December 2004, here are the top ten...
spelling -- (google hits) -- (nytimes.com hits)
fuhgeddaboudit (82200) (20)
fuggedaboudit (6760) (14)
fuggedaboutit (6040) (4)
fuhgeddaboutit (5770) (35)
fuggetaboutit (3760) (0)
fuhgetaboutit (3430) (2)
fuhgedaboudit (2530) (8)
fahgetaboutit (2470) (0)
fugedaboudit (2240) (0)
fugetaboutit (2010) (0)