man-to-man (Adjective) — Forthright and honest. ex. "had a man-to-man talk about the facts of life"
man-to-man (Adjective) — (sport) being a system of play in which an individual defensive player guards an individual offensive player. ex. "man-to-man defence"
man-to-man (Adverb) — Directly. ex. "we must talk man-to-man"