Dictionary.net

forthright and honest; "had a man-to-man talk about the facts of life"

directly; "we must talk man-to-man"

being a system of play in which an individual defensive player guards an individual offensive player; "one-on-one defense"

forthright and honest; "had a man-to-man talk about the facts of life"

directly; "we must talk man-to-man"

(sports) being a system of play in which an individual defensive player guards an individual offensive player; "one-on-one defense"