A fork of Rural Dictionary
A large serious bicycle rider that is comparable in weight to that of a two person tandem.
"That rider I was following was a total mandem. Crushing it on the flats but dropped as soon as the road when up."
Usually used to express a group of people preferably a gang. It's used as a term to explain a group or people or as a threat.
Tom - what you gonna do about it? John - imma set bare Mandem on you