lip

n. either of two fleshy parts which form the edge of the mouth of humans and animals; edge which projects outwards; boldness, impertinence, impudence (Slang)

v. kiss, osculate; answer back, answer insolently

Lips are a visible organ at the mouth of humans and many animals. Both lips are soft, protruding, movable, and serve primarily for food intake, as a tactile sensory organ, and in articulation of speech.
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Lip, or Lips, may refer toLip, a soft, protruding organ at the mouth of many animals, including humansBig Lips, Paul WilkesAlex Lips Australian Porn StarLip factory, a French factory which was self-managed in the 1970sLip, the main character of the Super Famicom video game Panel de PonLips Manlis, a criminal in Dick Tracy, portrayed in the film as Paul SorvinoLip Gallagher, one of the main characters in the television drama, Shameless.Lip, a former brand of watches based in the French city of BesançonLips, a minor Greek god and one of the Anemoi, representing the southwest windLips, an obscure hippie muppet character from The Muppet Show who was the trumpet player for Dr. Teeth and The Electric MayhemLabia (Latin for "lip"), refers to any lip-like structure, especially:the vulva, the external female genitalia, consisting of the labia minora and labia majora.Labial scales are those scales that form the lips of a scaled reptile's mouth.The Flaming Lips, a rock band commonly referred to as "The Lips".
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Lip 1. the upper or lower fleshy margin of the mouth. 2. any liplike part; labium. cleft lip a congenital cleft or defect in the upper lip. [more]Lip - Community and Resources

Noun
1. fleshy folds of tissue as those surrounding the mouth
(hypernym) external body part
(hyponym) labium
(part-holonym) mouth
(part-meronym) labial artery, arteria labialis
2. an impudent or insolent rejoinder; "don't give me any of your sass"
(synonym) sass, sassing, backtalk, back talk, mouth
(hypernym) impudence, cheek, impertinence
3. the top edge of a vessel
(synonym) brim, rim
(hypernym) edge
(part-holonym) vessel

n. lip