bikern.
英 'baɪkə | 美 'baɪkɚ
中文n. 骑摩托车的人；骑自行车的人
词根词源
biker (n.)"motorcycle rider" (especially with reference to club affiliation), 1968, American English, from bike (n.) in its slang sense of "motorcycle" (1939).
关键词