Man-on-mansplaining 

the explanation of something by a man, to another man who they perceive as their inferior, in a manner regarded as condescending or patronizing.

There was a lot of man-on-mansplaining in the office today between Bert and Matt.

Man-on-mansplaining by Fz9g3z September 10, 2019

Man-on-Man-Splaining 

When you've run out of women to mansplain to, so you resort to men instead.

"Did you happen to attend last night's amateur radio club meeting?" "Yes, a lot of man-on-man-splaining."

Man-on-Man-Splaining by addat November 13, 2023

manonmansplaining

When, in the absence of women to be condescending towards, one of two or more men temporarily assumes the role traditionally occupied by the female in such an exchange. The mansplainee, as it were.

"No, no, no Derek, not at all. What Foucault actually meant by that was that academia itself is the panopticon."

"Of course I knew that John, I've a DPhil from Cambridge after all. Just because you went to Oxford is no ground for manonmansplaining."

"I say, don't get cross. Though you do look so jolly adorable when you're angry."

manonmansplaining by Bulgakov November 12, 2022