Something absolutely fantastic and one of a kind in greatness. Tends to be used to describe Irn Bru.
"That's Coke's aye raj ya wee midden. Geez us an Irn Bru. It's pure phenomenal, like."
a word generally used by lying bastards who overexaggerate everything they do or say.
I played an absolutely phenomenal shot on the 17th at the belfry last weekend.
Adj. Used to describe someone who is neither extraordinary nor unusual; but to do the complete opposite. It is used to mock someone, to make someone who has no special talents or traits, think they are "Phenomenal".
Diana says to a illiterate, 18 year old boy: "Your phenomenal at reading!"