Is it even appropriate to conflate MordeTwi with "meme"? Can I even change the implications for the "mordetwi" tag; how do I do that? I think it's erroneous to call it a meme, especially since ships here aren't even automatically counted as a meme (AFAIK), yet MordeTwi seems to be the only exception to this. The idea that MordeTwi is a meme stems from the false attribution with the "Airplanes" art – mistakenly proclaimed as the conception/origin of the pairing; or that the ship supposedly was started off as a "joke pairing" (like it was invented in the Post-Irony era).

Somebody, tell the mods to remove the "meme" implication from MordeTwi or something; not every MordeTwi fan art is a meme art!

MSTO said:
Is it even appropriate to conflate MordeTwi with "meme"? ...

Just tag Mordecai and Twilight Sparkle characters and don't use the mordetwi tag. The tag implicates meme, so if the tag is present then meme will also always automatically be added. You can't remove it unless you also remove the Mordetwi tag.
I don't believe the mordetwi tag even is valid unless the art includes aspects of the meme (ie the lyrics, space aesthetic, etc.). If you believe the implication should be changed/removed, you can create a discussion about it in the forum or discuss in the discord, and then a BUR for users to discuss and vote on it further. In this case it would be unimply mordetwi -> meme