Fastest Known Time. The fastest time anyone has completed a given task, i.e. running a trail, climbing a mountain, etc.
TK just set the FKT running from South Rim to North Rim on the Bright Angel Trail
by sckbreed January 12, 2014
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Abbreviation for "fanatics know the score", often used as a sign-off message for windmilling, fish and chips in East Stand eating, conversation starting with young boys in the John Charles stand toilets fanatic KBEES on Leeds United message board WACCOE.

Usually preceeded with a rant about Leeds owner Ken Bates, a moan about the attendance and ticket prices or an anecdote involving KBEES and the top boy of a rival team's hooligan firm getting along like old friends.

NFDKTS
I spoke to two young boys in the John Charles stand about Bates' ticket price but as they were prawn sandwich eating, jester hat wearing non fanatics they didn't know the price, so they weren't even aware of Ken Bates destroying our club. Even one of Millwall's top boys who I had a pint with in the Peacock last Tuesday agreed that there are loads of NFs unaware of what is happening to Leeds.

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