A situation, state of mind, or adjective used to describe someone or something that is slacking, lazy, sluggish, or sloth. Slacktacular is used mostly in school or during senioritis.
"Dude I can't keep up with the reading for Jane's class, I'm done, I'm not doing another homework assignment for the rest of the term."
"Thats slacktacular!"
or
"I have such senioritis, I have a feeling things are gunna start to get slacktacular."
1) A term used to define the actions of an individual who seems to be doing something profoundly retarded.
2) An exclamation usually said sarcastically used to display one's lack of enthusiasm for something.
1) 'ooooooo spactacular!'
2) 'wat a spactacular idea'
3) 'u no that's a bit spactacular?'