It can have many different meanings.
Usually replaces the word "fuck" in a language called flernglish, so that you can freely "curse" without actually "cursing", because nobody knows wtf you are saying.

If said in the sense of something being "flarky" then it means cool or awesome.
Person A: Dude, I totally flarked that girl in the ars!
Person B: Dude, Thats the same girl that I flarked in the ars! That is so flarky!
by Daviel May 05, 2008
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Assumed to be an equivalent of "fuck". Originated on an episode of the early-90s ABC show "Dinosaurs".
by anonymous August 04, 2004
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To fart in your hand and put it on someons face
Lol I flarked my mom while she was asleep.
by Mr .kitty February 16, 2010
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The sexual act of urinating onto/into someones eye.
Hey baby, have you ever tried flarking before?
by Puedro September 29, 2014
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An underwater jalepno from a rectum, causing air bubbles to rise to the surface and make a very foul stench.
Jordan was in the pool and he flarked.
My God that flark was stinky!
Sometimes a Buatis Fratis Uv creates the same stench.
by Compton III December 30, 2005
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relationship that not many ship but is canon unlike bellarke and clexa.
(clarke is a bitch and finns a dickhead so y'know i fucking ship the hell out of this)
flarke is a pair of sucky skets.
by warriorxblake June 02, 2017
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