(nonstandard, pronunciation spelling) Alternative form of fifty.
I need 'bout three dollars and fitty cents.
noun
(nonstandard, pronunciation spelling) Alternative form of fifty, especially a 50-caliber machine gun.
adverb
(Cornwall) Properly; fitly.
[…] Cornish and Catholic, so that Miss Pascoe in the choir-loft of the church of the Immaculate Conception can admonish the organist: 'Do it fitty, my handsome.'