nip and tuck

definition: even or close in a race or competition or comparison
example:
speech part: adverb
synonyms: head-to-head
definition: inconclusive as to outcome
example:
speech part: adjective
synonyms: neck and neck
definition: plastic surgery to remove wrinkles and other signs of aging from your face
example:
speech part: noun
synonyms: lift

How nip and tuck is being used?