to demand a contribution, donation, or loan from a business or wealthy individual

有些单位巧立名目向企业要钱，这种吃大户的做法严重影响了经营。

to plunder the homes of the wealthy for food during times of famine

旧社会闹饥荒的时候，走投无路的农民常去吃大户。

expression · to rely on or live off others who are better off, often because one has no personal income

他失业以后没别的地方去，只好在亲戚家吃大户。