这是美国俚语420 friendly: This is a way to express the acceptance of smoking pot or accepting someone who does so, without overtly mentioning pot or marijuana.就是说此人吸du或对别人这样也能接受，而不直接提到du品或者大麻这些字例子：You may find the phrase 420-friendly often in personal ads, especially on Craig's List.
陈家小鱼儿
