Top Definition
A grammar nazi, someone who changes or corrects poor grammar
someone keeps changing all the jokes on Sickipedia. He's a right nobby Fles
by St!cky July 23, 2008
1 more definition
typically used as a verb meaning to really screw something up big time.

Could also mean that someone is being very very dorky
"Wow, Maddy, you really flesed up that corner kick!"

"Wow, you are such a fles! I don't even want to be seen in public with you!
by majorpayne16 March 11, 2009

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