The concept of “mansplaining” is one of the best terms to appear on the internet for quite some time.  It is, I believe, a term that crosses gender boundaries in many circumstances; though men, and particularly academic men, seem to be particularly guilty of it.  I just had someone patiently mansplain to me that the concept of a warp drive is not a warp drive and does not make a real warp drive come into existence.  Thank you, Captain Obvious!  This has to be one of my biggest pet peeves among academics.

At any rate, from the Urban Dictionary:

1.  Mansplain

To explain in a patronizing manner, assuming total ignorance on the part of those listening. The mansplainer is often shocked and hurt when their mansplanation is not taken as absolute fact, criticized or even rejected altogether.

Named for a behavior commonly exhibited by male newbies on internet forums frequented primarily by women. Often leads to a flounce. Either sex can be guilty of mansplaining.

2.  Mansplaining

To explain something in an unnecessarily long winded way, so as to dominate the conversation, and to make statements that are not based on facts, assuming that people will believe and agree with him because he is male.

3.  Mansplaining

Despite claims of superior strength in avoiding over-emotional reactions, when a man encounters even one iota of criticism of men on the internet, he must then mansplain why women suck by comparison or must be radical feminists.

Don’t be a mansplainer!  If something seems obviously stupid to you, chances are you’re the one who has missed something.  If you find yourself holding forth in a discussion, you’re being a bore.  I hasten to add that I’m often guilty of mansplaining and need to stop it as well!