lawn sign
noun/ˈlɔːn saɪn/
/ˈlɔːn saɪn/
(North American English)- a board that people put outside their house in order to advertise something or to show that they support a particular politician or political party
草坪插牌，户外告示牌（置于宅前，用于广告或表明户主支持某政治人物或政党）