Best definition
one who pretends to know it all, but the source of info is wikipedia..they even quote exactly as written in the article and denial is always part of their personality
regular dude: i love the way minne riperton sings..

wikiposer: Riperton is perhaps best remembered today for her ability to sing in the whistle register, in which she had rare facility.

OR they even citate what they shouldn’t

regular dude: shit, i love beer..

wikiposer: Beer is the world’s oldest1 and most widely consumed2 alcoholic beverage and the third most popular drink overall after water and tea – see image above-

regular dude: wtf?