When you have an illness which makes you super fab!
"Oh, Mom! I can't go to school because I have Fabadabadosis!"

"Urmm, I won't be able to get to work today, I have a rare case of Fabadabadosis!"
by Fab New Yorker March 17, 2013
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fabadabadosy is a word that was created by jaylee. it usually relates to something hella janky or messed up. you can also use it to show dissappointment.

fuh`bahh`duh`bah`doe`zee.

lol
yo` baby that chick was hella fabadabadosy.
by woopie dibo August 21, 2006
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