Someone who, during the game of Jenga (or strip Jenga if you're feeling adventurous), takes one of the bottom outside blocks very early on in the game.
pretty much the same meaning as the word asshole, but with more definition, and more demeanor, but not as evil in a sense. Jasshole is used in times of when friends or relatives want to joke with one another and not actually call the intended person an actual asshole.
Example 1: playing the card game asshole
Guy1: haha i'm president sucka
Guy:2 yea im neutral.. whos ass?
Guy3: i think Chris is
Guy1: haha jasshole gimmie your best cards.
where an asshole is merely the least attractive part of any normal person, the jackasshole represents the least attractive part of a very unattractive person, the asshole of a jackass.