Broggg

A broggg is an action or series of actions one can take that can alter the course of a friendship. Broggging, as it is sometimes known, is an online term used to describe someone who completely turns on a person, being an intentionally bad friend, or cutting ties with them entirely, for seemingly no reason. This can also be used as a noun, to describe a fake friend, or a liar in a friendship.

"man, tony completely broggged me, he cut all contacts and told everyone i was short!"
"bro, Jake is such a broggg, i cant believe he lied about everything to me"