A mix between spontaneous and fabulous. Usually used to explain a
random, but equally awesome moment in
time. It could be looked at from many angles, and
even called fateful that something so spontabulous could have ever happened.
"
Whoa, that concert we went to last night as so
cool. It was really
gnarly when we got to meet the lead singer; that was spontabulous!"
"Yeah, I didn't think they'd let us."