[1] : The Collaborative International Dictionary of English v.0.48

lip \lip\ li^p, n. oe. lippe, as. lippa; akin to d. lip, g.
   lippe, lefze, ohg. lefs, dan. laebe, sw. laumpp, l.
   labium, labrum. cf. labial.
   1. one of the two fleshy folds which surround the orifice of
      the mouth in man and many other animals. in man the lips
      are organs of speech essential to certain articulations.
      hence, by a figure they denote the mouth, or all the
      organs of speech, and sometimes speech itself.
      1913 webster

            thine own lips testify against thee.  --job xv. 6.
      1913 webster

   2. an edge of an opening; a thin projecting part of anything;
      a kind of short open spout; as, the lip of a vessel.
      1913 webster

   3. the sharp cutting edge on the end of an auger.
      1913 webster

   4. bot.
      a one of the two opposite divisions of a labiate
          corolla. b the odd and peculiar petal in the
          orchis family. see orchidaceous.
          1913 webster

   5. zool. one of the edges of the aperture of a univalve
      shell.
      1913 webster

   6. impudent or abusive talk; as, don't give me any of your
      lip. slang

   syn: jaw.
        1913 webster

   lip bit, a pod auger. see auger.

   lip comfort, comfort that is given with words only.

   lip comforter, one who comforts with words only.

   lip labor, unfelt or insincere speech; hypocrisy. --bale.

   lip reading, the catching of the words or meaning of one
      speaking by watching the motion of his lips without
      hearing his voice. --carpenter.

   lip salve, a salve for sore lips.

   lip service, expression by the lips of obedience and
      devotion without the performance of acts suitable to such
      sentiments.

   lip wisdom, wise talk without practice, or unsupported by
      experience.

   lip work.
      a talk.
      b kissing. humorous --b. jonson.

   to make a lip, to drop the under lip in sullenness or
      contempt. --shak.

   to shoot out the lip script., to show contempt by
      protruding the lip.
      1913 webster
see also:
labial orchis orchidaceous lip bit auger lip comfort 
lip comforter lip labor lip reading lip salve lip service 
lip wisdom lip work to make a lip to shoot out the lip 

[2] : WordNet (r) 2.0

lip service
     n : an expression of agreement that is not supported by real
         conviction syn: hypocrisy
see also:
hypocrisy 

[3] : Moby Thesaurus II by Grady Ward, 1.0

31 moby thesaurus words for "lip service":
   bomfog, pecksniffery, tartuffery, tartuffism, cant, empty gesture,
   false piety, formalism, hypocrisy, hypocriticalness, lip devotion,
   lip homage, lip praise, lip reverence, lip worship,
   mealymouthedness, mouth honor, mouthing, mummery, oiliness,
   ostentatious devotion, pharisaism, religiosity, sanctimoniousness,
   sanctimony, snuffling, soft soap, solemn mockery, sweet talk,
   tokenism, unctuousness

Cleft Lip >> C Words
Cleft Lip, definition of term: Cleft Lip
cleft+lip_pag1.html

Civil Service >> C Words
Civil Service, definition of term: Civil Service
civil+service_pag1.html

Channel Service >> C Words
Channel Service, definition of term: Channel Service
channel+service_pag1.html