A word mixing of "slob" and "fantastic". It is anything that requires no work of any kind and that in itself is fantastic. This word may be used as an adverb or adjective.
J: Yo, you wanna come over slob?
M: That would be slobtastic
T: I'm all about having a slobtastic summer.
MK: Yeah, bro, skimmin, sleeping, slobbin...that sounds like a slobtastic awesome kind of summer to me.
Adjective
Used as a noun: slothtacticity
E.g His slothtacticity was immense
Definition: Being so lazy that it becomes a good thing. Being lethargic and not doing much then something happens to make it worthwhile.
E.g. Yeah dude I stayed at home all daytoday... What? There was a thunderstorm and lightning struck the office? OH YEAH!!! I'm slothtastic!!
Some friends were hotboxing a car, having a coherent discussion about a topic that is no longer remembered, when one of the friends remarked, "...a spontastic lightning strike."
The root of the word is a bit of a mystery, but most likely it is a stoned mixup between spontaneous and fantastic. Such can be taken as the meaning.
Five minutes after the session, I was spontastically stoned.
I had some spontastic sex last night...with your mom.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.