Wejsil/Vejsil comes from the Turkish when Bosnia was still part of the Ottoman Empire and originally descended from "Veysel". Also it stays for a unattached, independent smart men.
Like a weasel - weasel like qualities in appearance and/or manner in humans. For a thorough examination of the concept see 'Dilbert and the Way of the Weasel'.
A certain economist comes across as a bit of a weasel, without naming names, I would say this economist is weasily, e.g. Ivan Krisskoff is weasily.
A nice man with a beautifulpersonality. He is a guy with kindness, confidence and humour. Wesil is a man with many friends, he is smart and is very well looking.