first coined by the BiG. P (the Pat man) Diddy To discribe head jobs.
Verb: The act of giving oral sex to a male. A female will fold her lips over her teeth to make her mouth more "smooth" This reduces the chance of injury to said male.
The girl is on the rag so I can only cop smooth lippies this week.
She needs to suck a dick. Some Smooth lippies would ease her stress