freewheel

freewheel
verb
  1. [no obj.]ride a bicycle with the pedals at rest, especially downhill
    (尤指下坡时骑自行车)靠惯性滑行
    the postman had come freewheeling down the track.
    邮递员骑着自行车顺着这条路靠惯性滑了下来。
    ■[usu. as adj. freewheeling]act without concern for rules, conventions, or the consequences of one's actions
    随心所欲(或不受约束、不计后果)地行动
    the freewheeling drug scene of the sixties.
    六十年代自由放纵的吸毒场面。
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