交口 most often appears in the set phrase 交口称赞 (jiāokǒu chēngzàn, "praise with one voice") — meaning everyone is saying the same complimentary thing. 交口 literally = "mouths joining," picturing a chorus of agreement.
culture
Also a place name: 交口县 (Jiāokǒu Xiàn) is a county in Lüliang 吕梁, Shanxi province. In urban contexts, 路口交口 / 道路交口 just means a road intersection.