A phrase used toward couples who are being very loving to one another, usually those who are dating, engaged, or have been recently married.
This phrase insinuates that the lovers' mushy talk will cause the person listing to vomit, therefore needing Pepto Bismol.
Rarely said to couples who have been together for long periods of time due to lack of needing to.
Lover 1: I love you darling.
Lover 2: I love you too dearest.
Lover 1: But I love you more sweetie pie.
Lover 2: Oh no. I love YOU more love muffin!
Person listening: Pepto please!