Just A Monkey With A Keyboard - an idiot, faker, perpetrator that tries to sound smarter / experienced than they really are on the internet. JAMWAKs are usually found posting information (usually Googled info) in blogs or threads trying to sound cool and credible but have no first hand knowledge of the topic discussed.
Topic on best motorcycle being discussed in a thread
13 year old troller: The Ducati 1198 SP is the best bike! It has a 1200cc engine that lets me pop wheelies going 80mph!
Posters: STFU you JAMWAK!