The Oxford English Dictionary - the 'bible' in such matters - does not list any such usage whereby 'mother' may be used of a man except in the possible instance when tea is being served. In such a situation, anyone - male or female - might say, "Shall I be mother?" or "You be mother" meaning "Shall I pour the tea?" or "You pour the tea."
Was it The Avengers or some similar 1960s 'special agent' TV series in which the spymaster - a man - was called 'Mother'? But that was a joke.
As regards Squarebear's suggestion, as an ex military officer, I'd be horrified if any of my juniors had ever referred to me as 'Mother'!
The only general such usage is the one offered in my opening response above...ie an abbreviated American curse-word.