Abbreviation of 'one other' (or 'another'), for use in situations where two words would sound stifling, and/or when the singular has already been defined.
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a grammatically incorrect figure of speech that has become socially acceptable, due to its convenience as a lazy combination of the words "whole" and "another"
Mindless teenager: I really like "Laguna Beach" but I became super stoked when I found out that LC was in a whole nuther show called "The Hills."
Nickleback fan: Sames!
16š 3š