2gaai choi 芥菜 — [mustard cabbage] used to object to what someone is saying or doing, "you must be kidding!" (a humorous variant of gâau cho 撬結).
3gaai lâan choi 芥蘭菜 — [kale vegetable] used to object to what someone is saying or doing, "you must be effing kidding!" (humorous variant of gâau lân cho 撬闆結).