This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Informal A person regarded as eccentric.

n. An eccentric or unusual person.

adj. Exotic, not mainstream, such as an oddball word or an oddball computer program.

n. A person with an unusual or odd personality; an eccentric person.

n. Anything unusual in its class.

adj. Eccentric; very unusual; strange; bizarre.

n. a person with an unusual or odd personality

"Adding, what I call oddball ornaments to my Christmas tree, really has nothing to do with the fact that I have a child."

anomaly    unusual person   

weirdo    queer fish   

screwball    wacko    nut case    nutter    fruitcake    nut    crackpot    crank    whacko   

eccentric    eccentric person    geek    strange    bizarre   

houseand    unilateralist    epicycles    '''    non-conformists    crackpot    ex-chief    cargo/troop    maverick    dissatisfactions