What exactly constitutes a Muscle Wizard?

What exactly constitutes a Muscle Wizard?

A wizard that uses magics to enhance their body in a way that makes them better at smashing things.

I actually made a decent build in 3.5, basically made a multi class martial/wizard that had school specialization in transmutation, and all of her spells were stat and AC buffs. With a couple of metamagic feats, her strength and AC could jump 10-20 points in just a couple of rounds.

Look at this sorcerer, he thinks a Muscle Wizard uses magic for gainz.

Muscle wizard uses his gains for magic

Any magic user that can use his physical might as the means to increase his magical potency, sort of the opposite of those settings where it's based on intellect instead.

Eh, it was fun. The DM approved it thinking it wouldn't amount to much in a fight, only to have her turn out to be the party's heavy hitter.

They're sort of a reverse lich - by using various arcane magicks they keep their muscles to a high standard of condition while their bones are slowly ground to dust beneath their constant flexing.

Eventually the Mussel Wizard is left as just a writhing mass of muscle tissue augmented by the arcane might of the muscle wizard's mind and magickal powers.

What about a Mussel Wizard that's like a Worm that Walks but with a mass of mussels instead?

Their source of power being their buff and powerful Muscle Mystery, obviously.

Someone who can reach out and probe the unknowable with their bodymind.