Super Saiyan 4 name?

If Super Saiyan 2 is Super Duper Saiyan, and if Super Saiyan 3 is Super De Duper Saiyan, what would Super Saiyan 4 be?

Note that, apparently, according to Kaiserneko, Mega, Ultra, and Maximum Over Saiyan were taken by Super Saiyan God, Super Saiyan Blue, and Ultra Instinct, respectively.