The opposite of trickle down, and mostly used as an answer to it: money moves from ordinary people up to the rich, or fashion and ideas start on the street and rise up to the big brands. You will meet it in opinion writing about the economy or fashion, almost always standing next to 'trickle down' — it is a play on that phrase, so the joke only works if you know the original. No object.

（財富、潮流）由下往上流動