Derived from the word Yeat (a rapper) combining W and Yeat, its is used to describe when Yeat goes crazy in a song, also commonly used is streamers chats when reacting to Yeat.
guy: hey, do you listen to sweater weather?
girl: yeah, are you coming out to me in any way what-so-ever?
guy: still questioning.
girl: well, I support you :)