Definitions of nip and tuck:

• noun:   plastic surgery to remove wrinkles and other signs of aging from your face; an incision is made near the hair line and skin is pulled back and excess tissue is excised
• adjective:   inconclusive as to outcome; close or just even in a race or comparison or competition

  Example: "The election was a nip and tuck affair"

• adverb:   even or close in a race or competition or comparison

  Example: "He won nip and tuck"