1) A non-banked, oval track flush to the ground on which the sport of roller derby can be played.

2) A type of roller derby governed in present day by the WFTDA (Women's Flat
Track Derby Association), with specific rules pertaining to bouts played on a rink with no banked edges or "rise".

3) A particularly D.I.Y.-type of Roller Derby, in that it requires only a flat, smooth floor, tape to measure out a track, and rollergirls to kick some booty.
"Though the spandex leagues of the 1970s fought their way to victory on a banked track, many of the 21st century leagues like New York's Gotham Girls Roller Derby have embraced the cost-effective, nomadic appeal of flat-track derby."
by Ashlie Atkinson July 31, 2006
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A sportsperson or sports team who dominate inferior opposition, but who cannot beat top-level opponents
"What do you think of Silviniaco Conti's chances in the Gold Cup?"
"Nah, no chance. He's a flat track bully!"
by JoshPearson10 November 25, 2015
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A player like Rohit Sharma who scores lots of runs on flat tracks and fails miserably on other pitches.
by Pradeep Kumar January 15, 2021
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"Geez Trev, Port are flat track bully team this year, 160 against North Melbourne and lose to Geelong"
"Yeah they are shit house bro"
by StupidKiwi June 18, 2021
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