[tks2103]

"butthurt" is the pain you feel in your anus after being anally raped.

If you scroll down on that knowyourmeme page that you linked, you will see a set of memes in the "Buttfrustrated" category. The Brony meme has a set of insults that reference the anal rape: "Im sur thers sumpony who can help fill ur ass with semen laced hrut".

The percentage of cases in which a person is referencing "butthurt" to indicate a spanking is vanishingly small. Play the game "League of Legends" and complain when you lose. Ask people what they mean when they claim you must be "butthurt".

Did I just type those words?

[wpietri]

I could believe some people use it that way; I just disagree that's the primary meaning.

[xer0x]

Yep, you just said that!