If something is fake, it means that it looks like something, but…
To tumble means ‘to fall helplessly,’ ‘to roll end over end or flow over,’ or ‘to roll about.’ Figuratively, it means ‘to decline’ or ‘to fall suddenly from an authority position.’ It also means ‘to fall into ruins.’ Informally, usually with an adverb, it means ‘to come or go in a fast, disorganized way.’ As a noun, a tumble is the act of tumbling, an accidental fall, a drop in value, and a fall from an authority position…