Green’s Dictionary of Slang

amazing! remarkable!; also as adj.

2008		‘Jessica & Hunter’ Breakfast youtube.com 🌐 Hunter. Oh my god, that afterhours party we went to was so sick. Jessica. I know, it was amazeballs.
2011		A. Carter Top of the Cake Pops [ebook] Contents [...] Amaze Balls.
2012		C. Heywood Bridge of Her Own [ebook] To my Amazeballs cover designer Sarah Hansen.
2016		T. Robinson Rough Trade [ebook] I wish I had the words to describe his expression. I really do. It was amazeballs.
2016		Guardian Rev. 2 Apr. 7/3: He is keen to stress the value of evrything, from the use of ‘amazeballs,’ to [...] Singlish, Chinglish, Japlish and other mixed tonguers.