1. He sent the horse forward with a slap on its rump.
    他拍了一下马尾，马便向前跑去。

1. 屁股：牛排一般选自牛屁股(rump),牛腰(loin)上的肉而腰上的肉又包括了西冷(sirloin),和菲力(fillet),T骨(T-bone)

2. 臀肉：跨年晚餐想做的烤牛肉,本来是想用牛臀肉(rump)的部位来做,可是在台北找不到这块肉哩,去City Super问没有,Costco也没有,打电话去肉品进口商位於内湖的美福询问也没有,美福肉品和我通话的人说台湾没有进口这个部位,

3. 牛臀肉：跨年晚餐想做的烤牛肉,本来是想用牛臀肉(rump)的部位来做,可是在台北找不到这块肉哩,去City Super问没有,Costco也没有,打电话去肉品进口商位於内湖的美福询问也没有,美福肉品和我通话的人说台湾没有进口这个部位,

4. 腿肉：fillet : 里脊 | rump : 腿肉 | steak : 牛排

1. 残余分子;残存力量
    The rump of a group, organization, or country consists of the members who remain in it after the rest have left.

rump的解释

    e.g. The rump of the party does in fact still have considerable assets...
           事实上，这个党派的残余分子确实仍然拥有可观的资产。
    e.g. He finds himself heading a rump party largely out of tune with his own views.
           他发现自己领导的这个残存的党派和自己的观点大多不符。

2. （动物的）尾部，臀部
    An animal''s rump is its rear end.

    e.g. The cows'' rumps were marked with a number.
           奶牛的臀部标着一个数字。

3. 臀肉牛排
    Rump or rump steak is meat cut from the rear end of a cow.

4. （人的）屁股，臀部
    A person''s rump is his or her bottom.

    e.g. ...jeans stretching across her rump.
           紧裹她臀部的仔裤

1. the part of an animal that corresponds to the human buttocks

    Synonym: hindquarterscroupcroupe

2. the fleshy part of the human body that you sit on

    e.g. he deserves a good kick in the butt
           are you going to sit on your fanny and do nothing?

    Synonym: buttocksnatesarsebuttbacksidebumbunscanfundamenthindquartershind endkeisterposteriorpratrearrear endsternseattailtail endtooshietushbottombehindderrierefannyass

3. fleshy hindquarters
    behind the loin and above the round