Pronunciation: (od'bôl"), [key] Informal.
a person or thing that is atypical, bizarre, eccentric, or nonconforming, esp. one having beliefs that are unusual but harmless.
whimsically free-spirited; eccentric; atypical: an oddball scheme.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.