A man office. An office or workspace, usually located in the home, designed by and for a man. The moffice includes features and amenities that support a man's lifestyle - such as posters on the wall, big screen TV, comfortable seating, and even a kegerator. It's where a man goes to work.
Similar: Mancave in a more business-like setting.
-Dude, are you going to be working later?
-Yeah, I'm working out of my moffice today. Come by for a beer since I'm about to send in my report.