gasmic is a shortening of orgasmic, but in being it is seen as becoming better as shown in this story
there is a bus traveling from cambeltown to bowral but to do so it must pass through mittagong, mittagong is a reprisentation of the 'org' and bowral is a representation of the 'gasmic'. now mittagong is bad and ogie and no-one wants to be there but u have to to get to bowral which is good and yummie. so wot people do is go over mt. gibalter and skip out mittagong.
ie. no 1 likes to say 'org" so they just say 'gasmic'