Ah, "hudli hudli" stands for "Extraordinarily fast guitar playing" https://www.urbandictionary.com/define.php?term=Hudli https://www.urbandictionary.com/define.

Ah, "hudli hudli" stands for "Extraordinarily fast guitar playing" https://www.urbandictionary.com/define.php?term=Hudli https://www.urbandictionary.com/define.php?term=Hudli - it's only now that I look this up