A combination of the words fantastic and banter. To be used for the times the banter on its own is not enough, and fantastic just doesn't make the grade in expressing your past, present or future excitement over a situation or thing.
"I reckon tonight's gonna be bantastic"
"That poker game was bantastic"
"James got some bantastic abuse as regards to his massive shovel hands"
"I thought it was bantastic, but roomey just couldn't hack the manter"
The level of fantastic, awesome, radness that can only be known or obtained by a Britt and between the friendship of Britts. It consumes every waking hour of being a Britt, and is exponentialized when two or more britts, specifically BC's or BBeck's unite. Can also result in brain damage from exposure for extended periods of time.
It was absolutely BRITTASTIC! I feel a bithungovernow though.
A girl that is too much of a brat and too stubborn to let an opportunity (ie: a guy) come close to her because she would not be in control of it.
Brett: "So what happened, did you guys go on that date?"
Matt: "Well, I wrote her name -- A-N-D-R-E-A -- in the sky with the smoke from fireworks, but she said that she had to rearrange her room -- it's alright, there's always next time!"
Brett: "Man, that girl is bratastical!"