Why is being called a "Pick Me" an insult and further more, why do they use it as an insult?

I see this all the time on here and on social media. Any time a Woman says anything that could be seen as a defense of men in any form, you have angry bitter women saying "Did he pick you yet" and variants of calling her a "pick me"

Let me level with you, Yes, Unlike you, She got picked, Because unlike you, she's not an angry, bitter, hateful, insufferable woman. So yes, she got picked, Yes, she likely got married, and yes, unlike you, she is likely happy. Being a "Pick me" Is not the insult you think it is. and only makes those using it as an insult look pathetic, especially to the opposite sex. It gives the red flag that says "Avoid this idiot like the black death".

SMH..

Updates
5 mo
And just like that holly your comment is gone. Rule violation, don't insult people.
Updates
5 mo
by the way I am aware of the Google definition, but the definition doesn't match the facts, those posting the Google definition followed by insulting me will be removed.
Why is being called a "Pick Me" an insult and further more, why do they use it as an insult?
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