The latest round of Dragon Ball Z films introduced a new form for Saiyans like Goku and Vegeta. Unfortunately, it’s kind of a mouthful – Super Saiyan God Super Saiyan, a transformation that occurs when a Super Saiyan God goes Super Saiyan.
Apparently the Dragon Ball characters aren't fans of the name either, and the Dragon Ball Super manga provides a shorter, alternative name for the new form: Super Saiyan Blue.
Here’s a translation from Saiyan Island:
Vegeta: “Hahaha! That’s just what I was hoping for! Obviously if we’re both Super Saiyan God Super Saiyans, then as an elite I’ll definitely be superior!!”
Goku: “No way, my Super Saiyan God Super...Ow!!! I bit my tongue!!!”
Goku: “Hey Vegeta, can’t we do something about that long name?”
Whis drops down
Whis: “How about...Super Saiyan Blue?”
And additional transcription of narration from manga, again referring to the form as Super Saiyan Blue:
“In fact, a little while before this, the terrible emperor Freeza who had previously terrorized the universe came back to life and attacked Earth. However, after meeting Beerus and Whis, Goku and Vegeta received training from Whis, managing to evolve into Super Saiyan Blue, a form surpassing Super Saiyan God. And so they even managed to defeat the revived Freeza!”
Goodbye Super Saiyan God Super Saiyan, hello Super Saiyan Blue.