slang To have a very close margin between the competitors in a contest or competition. Primarily heard in US. This race has been nip and tuck, and we won't know who has won until the final vote is counted.
if two people who are competing are nip and tuck, they have almost the same number of points and either of them could win There's no saying who's going to win this game. It's been nip and tuck all the way.