1. (noun)neck and neck, head-to-head, nip and tuck even or close in a race or competition or comparison "the horses ran neck and neck"; "he won nip and tuck"
2. (adj)neck and neck, head-to-head, nip and tuck inconclusive as to outcome; close or just even in a race or comparison or competition
"as they approached the finish line they were neck and neck"; "the election was a nip and tuck affair"
3. (adverb)neck and neck, head-to-head, nip and tuck even or close in a race or competition or comparison "the horses ran neck and neck"; "he won nip and tuck"