Which witch

Sometimes they deliberately change it up to deny expectations though. Occasionally it's "Doctor what?!"

Also, at one point, a major antagonist outright lampshades the whole thing and claims The Doctor named themselves that way precisely so that conversation would always happen.

The Doctor's use of question marks in the(ir) past certainly lend weight to the argument, but on the other hand, the antagonist in question will say or do literally anything if it they think it will help them achieve their goal.

White lies. Outright genocide. Anything in between. So we have to take what they say under advisement.

Well the title itself is already that joke, I guess it's their way to hammer it in for everyone.

Drops the what?