Fig. exactly even, especially in a race or a contest. John and Tom finished the race neck and neck.Mary and Ann were neck and neck in the spelling contest. Their scores were tied.
if two people who are competing are neck and neck, they are very close and either of them could win (often + with ) Recent polls show the Republicans almost neck and neck with the Democratic Party.
So close that the advantage or lead shifts from one to the other or is virtually indistinguishable, as in The two are neck and neck in developing a new operating system for the computer. The term comes from horse racing, where the necks of two horses in competition appear to be side by side. [Early 1800s] For a synonym, see nip and tuck.
mod. almost even. (see also nip and tuck. Refers to horse’s necks being at the same place with regard to the finish line.) The horses were neck and neck at the finish line.