That is why I don't like Jisho. It does not explain things; It just throws definitions at you.
"Amazing", or rather 「すごい」, is a new and slangy meaning of 「えぐい」. It is used quite heavily among the younger generations nowadays. It is used far more often than you seem to think, too. Even I, who is not so young, used the word for that meaning to describe the excellent quality of the pizza served at my favorite pizzeria in Nagoya the other day.
We use the word 「やばい」 for the same kind of new meaning these days as well. For both 「えぐい」 and 「やばい」, the new meaning is positive, which is the opposite of what Japanese-learners might think.
This video is all about homeruns, but you might want to check its title at least.