资料来源 : Webster's Revised Unabridged Dictionary (1913)

Appeaser \Ap*peas"er\, n.
   One who appeases; a pacifier.

资料来源 : WordNet®

appeaser
     n : someone who tries to bring peace by acceding to demands; "An
         appeaser is one who feeds a crocodile--hoping it will eat
         him last"--Winston Churchill