For something, or someone, to be one of the following :
Awesome, Cool, Sweet, Fantastic, Uber, Radical, Tubular,
Gnarly, Ticklish, Amazing, Great.
"That car is so Quimbacious!"
Referring to the car being any of the things listed above.
1 very important fact about the word Quimbacious :
The word Quimbacious is so Quimbacious, it is necessary to capitalize it, in whatever given situation you may be using it in.