piggy in the middle

剑桥词典

[ 不可數或單數名詞：沒有複數形式的名詞 ] (US keep away)
a game in which two people throw a ball to each other over the head of a person who stands between them and tries to catch it
小豬站中間，過頂傳球（兩人相互曏對方扔球，另有一人站在中間試圖搶球的遊戯）
[ 可數名詞：有複數形式的名詞 通常作爲單數使用的名詞 ]
someone who is in a difficult situation between two other people who are arguing
（夾在爭吵雙方中間）左右爲難的人 返回 piggy in the middle