1) to be an idiot/scumbag/asshole

2) a female horse
Did you see that guy at the gym? He didnt know how to use the stairmaster...what a filly.

That filly is so precious.
by VenomNicole November 3, 2010
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formerly from seattle she was cast into the torture of a horrible place called wisconsin. now she must battle evil fiends and her cousins lackies to find a way out of THE TENTH CIRCLE OF HELL! will she get out? will the stupid boys in the back of the classroom ever just die?!?! will i ever stop asking rhetorical questions? NEVAR!!! wow katie ur life sounds like a disney movie...
wow fillis ur so cool people forgot ur real name!
by rainbow_colored_bangles April 21, 2005
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short for the word fellow, used mostly when talking about someone you don't know
Hey Kevin, look at that filly over there with the pink hair, what a loser!
by Little Nepa Tiz! Banas March 12, 2009
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a willy which looks scarliy like a fanny
omg i shagged this dude last night and his dick was a fucking filly
by P.M June 22, 2007
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When you make a joke, Thats stupid, and only one person laughs.
It's not quite funny but it's not quite silly.
" Kymburlie Just made a Filly "
by Sa'mantha' September 7, 2006
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you femaile horse up to the age of two years.
I"m selling that paint fill for $500.
by Laila May 19, 2004
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Fillie depression is when you Look at Millie Bobby Brown and Finn Wolfhard having “moments” together. These “moments” include non stop glancing at each other, Heart eyes, hugs, and the blushing and giggling while talking about The Mileven kiss ( On the show Stranger Things). Signs of having Fillie depression are watching fillie edits all day, internal crying, and constantly talking about Fillie with your friends and how it may have been real.
I was watching Fillie edits today and now I have Fillie Depression
by @wazowskifinn February 13, 2018
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