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1.
lacking importance- adjective
I was apalled that she would spend tons of money on something so frivolous
by parisologyperson May 22, 2008
 
2.
n: to frivole - to be gangsta: gangsta activities

adj: to be stylish; hotness; fa sho

disease: to have frivolitis - Well to break it down, "itis" is /inflamation of/ and "friv" is /gangsta/ and "o" is just a combining vowel.
-Man O-dub, you are so frivolous
-Why thank you, you have my blessings
by Owie and the FG's November 25, 2004