Used to describe and emphasize the pristine condition of a person place or thing when saying the more common word "immaculate" is not enough. Also used by questionable sales people who are misrepresenting their products and can't spell.
Example 1:
Friend : Dude, did you see that girl checking me out? She was imamaculate!
Fiend 2: Yea totes bro, she was fineeee!
When traffic is backed up for miles on a highway, crawling along -- and then suddenly everyone returns to normal high speeds without passing an accident, stalled car, or road construction.