Involving two persons; intimately private. Synonym:tete-a-tete."A head-to-head conversation"
2.
Inconclusive as to outcome; close or just even in a race or comparison or competition. Synonyms:neck and neck, nip and tuck."The election was a nip and tuck affair"
adverb
1.
Even or close in a race or competition or comparison. Synonyms:neck and neck, nip and tuck."He won nip and tuck"
... Turkey carpet, laid smoothly on the polished floor to be spurned aside by young dancers there; some impossible sea pictures, with patron saints in the clouds over mariners; an immense stuffed sofa, with an arm dividing it across the center;—the very place for those head-to-head conversations with young men which the girls of the house called "twosing." It was, in fact, the favorite "twosing" ... — Lazarre • Mary Hartwell Catherwood