Colgate kiss is a kiss after one of the participants has just brushed their teeth. “牙膏之吻”是指其中一方刚刷完牙就进行的接吻。 Example:  "He kissed me last night, right after he brushed his teeth. It tasted horrible.""Minty eh? That's a colgate kiss for you."“他昨晚刚刷完牙就亲了我，这味儿糟透了。”“薄荷味很浓对吧？你得到了一个‘牙膏之吻’。”