Dibbly Fresh
Taken from the Baby-Sitters Club seris books by Ann M. Martin. The BSC used the word "dibble" to describe something that was so cool you couldn't say "cool" to describe it. "Dibbly fresh" would be an ultimate compliment (in Stoneybrook in the '80's and '90's anyway).
"Claudia, I can't believe you get to go to the art show with *insert famous artist here*. That's dibbly fresh!"