How come “burbled” gets to be in the Oxford English Dictionary but “tulgy” doesn’t? Hm?

Twas brillig, and the slithy toves Did gyre and gimble in the wabe;All mimsy were the borogoves,And the mome raths outgrabe.”Beware the Jabberwock, my son The jaws that bite, the claws that catch!Beware the Jubjub...