The phrase is Egyptian Arabic slang where mahbab suggests something messed up, blackened or ruined, so the line works as the opposite of a kind morning greeting. With no confirmed original film, show or creator attached to this upload, its life is mainly on soundboards and in short form edits where a single spoken line has to carry the whole joke. It keeps circulating because the meaning is flexible, fitting traffic, work stress, exam results and any small disaster that ruins the start of a day.