Top Definition
Combination of the words Phat and Fantastic normal said under the influence of alchol when you tend to be slurring your words!
Jonesy: 'Why don't we try to build an assault course in the garden?'

Leppy: 'That is a PHATASTIC idea, mate'
by J Leighton September 13, 2005
5 Words related to phatastic

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