割韭菜

gējiǔcài
(fig.) (coll.) to fleece a group of people repeatedly (esp. small investors, consumers or fans), treating them as an endlessly renewable resource to harvest for profit

CEDICT

colloquial

Entry Composition

1 割 gē
  1. to cut
  2. to cut apart
2 韭菜 jiǔcài
  1. garlic chives (Allium tuberosum), aka Chinese chives
  2. (coll.) naive or easily exploited people (esp. small investors or consumers), likened to chives that can be repeatedly harvested for profit