also: まじまんじ
Youth slang interjection expressing excitement or admiration. Often used by young women. The 卍 here is a trendy intensifier without literal meaning.
新しい服、マジ卍!
Your new clothes are so awesome!
この曲マジ卍じゃない?
Isn't this song really cool?
Hiragana variant; less common but still seen.
Combination of slang マジ (seriously) and 卍 (manji), a Buddhist symbol repurposed in youth culture as a trendy intensifier. The exact origin of this usage is uncertain.