Definitions
1.VerbTo be brave or tough enough to deal with something in a manner that is considered strong or manly."I was wondering when he would man up and marry that girl he knocked up.; You need to man up and confront your boss about her behavior.; Hey son, man up, okay? There will be time for tears later."
2.Verb(Of personnel) to assemble, each person manning (attending to) his station, prepared for the departure of an aircraft, ship, etc.
3.VerbTo staff adequately; to staff up; to successfully fill all needed labor positions.
4.VerbTo vigorously guard the opponent to whom one is assigned.