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An exclamation of the joy of the moment pertaining to the first inhalation of a cannabis cigarette. A cultural reference to the long running UK advertising campaign for Bisto, a brand of gravy powder. In the commercials the signoff phrase "Ahh... Bisto" was always heard after the characters in the commercial had just smelled the gravy.
strike match.

light bifta.

draw...

"Ahh.... Bifto."
by hofun2006 March 01, 2009
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