資料來源 : pyDict

頭腦守舊的人,極端保守的人,老烏龜

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Mossback \Moss"back`\, n.
   A veteran partisan; one who is so conservative in opinion
   that he may be likened to a stone or old tree covered with
   moss. [Political Slang, U.S.]

資料來源 : WordNet®

mossback
     n : an extremely old-fashioned conservative