BOBOSH!
It's a phrase created by Taiylor Manson, to show excitement or to give hype to something. It can also be used as an exclamation to replace the phrase 'Mad Ting' or 'MAD'
Man 1 : Bro I just smashed my crush!!!
Man 2: BOBOSH!!! My brudda!!!!!!!
Man 2: BOBOSH!!! My brudda!!!!!!!