when you light a fart on fire while standing up and it rolls up your back
When he lit his fart it foxtailed up his back.
by CasinoB3po April 25, 2009
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Somebody who is just a little bit foxy, or, somebody who isn't particularly foxy but has a nice ass.
Yeah, what a foxtail!
by incandescent adolescent September 21, 2010
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When you fart on thermal camera, and it shows up in the thermal imaging.
Person 1: *farts in the cold in front of thermal camera

Person 2: WTF?

Person 2: Yep, that's one of those foxtail farts.
by NootNootProductionz February 12, 2021
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