Top Definition
When an opponent picks up a fantasy free agent strictly for fill in purposes out of utter desperation and that player subsequently goes for a career day to cement an unholy victory (and league championship) over a more deserving opponent.

(Named after Jabar Gaffney, for his week 17 performance for the Denver Broncos in 2009 when he went for 14 catches and 214 yards)
I got so fucking Gaffneyed by Rory when he picked up David Clowney as a bye week fill in and he had 8 catches and 2 TDs.
by CBFFL February 12, 2010

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