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1.
A combination of "frivolous" and "drivel", refers to any meaningless babble.
I drove my teenage daughter and her friends to the mall yesterday. I think I've had my fill of frivol for the year.

"Did you get her recent Tweet?"
"No. I don't follow frivol."
by qoagt April 14, 2009
 
2.
an adjective to describe how you are feeling at the moment
used when too many people stole your word or aren't sure how describe your mood
how are you today?
"I am frivol"
by ughish December 12, 2008