Defined as 'part spaz, all loser', Adam came up with this term in reference to people who will wait outside the Loveline studio in the parking lot with pictures of the guest(s), hoping to get an autograph. He jokes that when they hear how he is talking about them, that they vandalize his car.
This definition can also be applied to anyone who is a really big fan of someone, following them around and/or obsessing about their life (stalker?).
The spelling for this term is uncertain, as it is unlikely that Adam would ever care to write it out. Going by the words it is derived from, 'sploser' seems to be the proper spelling. Alternative spellings include 'splooser' and 'sploozer'.