Made up by two idiots a few years ago, this word is offered as a response to something amazing, or something so completely awesome that you will automatically, and undoubtably, jizz inside your trousers. Or pants.
jimtastic n. minor celeb. particulary adept at emptying public houses with an eclectic mix of indie, punk and ska.
jimtastic v. to achieve a full days wages within at least four hours of playing the above said playlists.
jimtastic a. the description of a woefully bad dj.
i went to the the boozerthe other day to see djjimtastic he only did a jimtastic ! he was the worst jimtastic dj i have ever heard.