Top Definition
this term may be used as an affirmative statement that adheres to a general concurrence by persons of the same ilk. tags may also by used in the subjective.
Kathryn: "Hey B! Are you on for a fews sauces tonight?"

Smithers: "Fact on, kid!"

Tana: "I heard you flaking a blast of shots last night. I'd say your balls must be worn off ya"

Chef Eoin: "I know ya, my arse was in bits after it.... fact on!"
by BobbyChops August 13, 2011

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