informal. : being said or discussed by (people) trendy words on the lips of talk show hosts a topic that is on the lips of many people.

What does it mean to hang on the lips of someone?

To listen very closely, intently, or with obsequious attention to what someone is saying. The politician was so charismatic that he had even his detractors hanging on his lips.

What does off the lip mean?

Off-the-lip

A re-entry. Turning the board quickly off the top of the wave to come back down into the face of the wave.