fawner

from WordNet (r) 3.0 (2006)

fawner
    n 1: someone who humbles himself as a sign of respect; who
         behaves as if he had no self-respect [syn: {apple
         polisher}, {bootlicker}, {fawner}, {groveller}, {groveler},
         {truckler}]

from The Collaborative International Dictionary of English v.0.48

Fawner \Fawn"er\, n.
   One who fawns; a sycophant.
   [1913 Webster]