Dictionary
did•dly
Pronunciation: (did'lē), [key]—
n.,
—pl. -dlies for 2.
Slang.
1. a thing of little or no value; naught:
Your excuses aren't worth diddly to me.
2. a flaw; malfunction.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.