I can't modify the wiki but I think deepthroat tag definition is incomplete.
I get the "balls_deep" implication, as deep_penetration is not for oral, but before anything, deepthroat is a penis shoved past the mouth inside the throat... Or at least reaching it with the tip for common people, WHILE for the craziest most experienced people out there, it's only "soft-pseudo-deepthroat" before we get to the eusophagial sphincter. (lol) And what I say is based on real world, so it's even more true considering this strange universe, where the lengh of the penis compared to the throat can be HIGHLY variable! (and still fit hehe)
For a small penis, like 4-2 inches, as long as it's really balls/base-deep I seems still acceptable, but the issue is an extremely large penis like 12, 15, 20! inches or even more gigantic horsecock... couldn't be considered deepthroat even if half-inserted or even 2/3 ?! (while probably already shoved in the eusophagus or even the stomach past the second sphincter who knows)
So I suggest :
"A form of fellatio (oral sex) where the whole lenght of the penis is taken inside the mouth, or reaches past it to the throat."
Or something like :
"A form of fellatio (oral sex) where the penis reaches the throat cavity past the mouth, or if almost its whole lenght is taken to the base."