When a man speaks to a woman exactly the same way he speaks to a man: somewhat mockingly, somewhat condescendingly, somewhat confrontationally. Ironically, feminists who champion equality among the sexes, expect men to change how they speak to accommodate their feminine sensibilities.
Woman: I don't feel conservatives care enough about social justice.
Man: That's ridiculous! That's just SJW propaganda. There can never be social justice if individual justice is ignored.

Woman: Stop mansplaining, you big jerk!
by Ijiwaru_Sensei November 19, 2016
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Mansplaining as an accusation of someone being patronizing while the accuser is choosing to be sexist themselves.

Feminists tend to use the term as a backlash while also letting out pent up frustration at males in society.
Guy: Hey did you know that the pill is known to cause...
Lady: I don't need someone mansplaining to me about female things!
Guy: Letting me know that you already know that would be fine, but since you didn't hear me out, I'll assume that you just wanted to be sexist.
by Driver4567 November 14, 2021
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A man explaining something to a woman in a way that is patronizing because it assumes that the woman will be ignorant of the subject matter.
Woman speaking to another woman: “ I don’t want to drink too much tonight, I have to work in the morning.”

Man standing near them at the bar: “ Actually if you drink a glass of water and take an ibuprofen before you go to bed you won’t be hungover.”

Woman: “Thank you for mansplaining, but I’m less concerned with alcohol induced dehydration and more concerned with getting to bed at a decent hour.”
by Black_Well_Bex July 17, 2018
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When a man feels compelled to condescendingly explain something to a woman on a topic that any reasonable person could see she knows more about than he does.
"That's not what mansplaining means. Mansplaining is..." he mansplains.
by elllie_b August 26, 2018
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Quite regularly, during team meetings in front of every else, when a woman who is reporting on her own project work with which she is most experienced with and has worked in the field for over twenty years, another peer always feels the need to "complete" her sentences mid-way, talks over her, hijacks her time to shine, taking over the explanations, progress report, issue deconstruction, evaluation, or review, thinking that even though they only have one fifth of the experience, knows little to nothing of her project work in detail, they must though have the knowledge to report on the woman's work better than she can.
She (as the lead scientist): To report on my findings of the project work I have been completing for the past month,

He (as the apprentice): <interrupting> the results show... bladibla…

Her peers: rolling their eyes, internally thinking (there he goes again, mansplaining...what a narcissist!)
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A way to attack faux sexism by using actual sexism
She said an El Camino was a truck. I told her I feel like it’s more a hybrid of a car and a truck.
She shot me for mansplaining and the woke majority called her queen
by CreativeFunnyName November 8, 2020
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Explanations done (mostly by men to women) in a condescending, overconfident often inaccurate and oversimplifying manner.

In many cases done by some guy to a female expert in a field.
Female expert: Here’s an article that shows how this issue is affecting another issue
Some guy: Well, actually it’s not that simple because this issue is affecting that issue in this way as you would understand if you actually read the article and this passage:*quotes article*
Female expert: I know, I wrote the article you just quoted. Stop mansplaining my own words to me.
by Someone else from your town August 3, 2018
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