amagendary

Simply the unlikely collaboration of the two words: amazing + legendary.

This team-up of words is used to explain an amazingly legendary situation, person or action.

John: Hey Greg! did you just see that!

Greg: what?
John: That cat just climbed a ladder!
Greg: AMAGENDARY!

Or

Sue: Hey Delores, did you see that guy's but? It was amagendary!
Delores: Is that so? I'm sorry I missed it...