Originally a steeplechase phrase. Desperate. A racing phrase; to win by a neck or to be nowhere—i.e. not counted at all because unworthy of notice.
neck or nothing (not comparable)
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “neck or nothing”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)