Chinese-smile，English-smile，which is a fake smile(11)

谄笑: ingratiating smile; fawning smile, flattery smile

真笑:    True smile, genuine smile

假笑： feign smile, fake smile

佯笑：feign smile，fake smile

龋齿笑 flattery smile as if teeth pain. （笑起来好像牙齿疼、满脸不高兴的样子。）語本後漢書．卷三十四．梁統傳：「壽色美而善為妖態，作愁眉，嗁妝，墮馬髻，折腰步，齲齒笑，以為媚惑。」

 

各位大神请拍砖！