The epitome of awesome. Usually used to describe
an event that is remarkably
positive in ones favor. Also can be used to describe the
immediate boner you get when a chick is super uber hot.
If one makes all of their opponents cups on a rebuddle in
beer pong its shwingtastic.
Guy: Dude I
heard you fucking in your room
last night 8 doors down the hallways!
Guy 2: I know! It was shwingtastic.