马颈圈 (grin through a horse collar 〔古语〕把头从马颈圈伸出来互作鬼脸的游戏;〔比喻〕硬充滑稽)。
horse: n. (pl. horses, 〔集合词〕horse) ...
collar: n. 1.衣领;硬领;项圈;护肩,(牲口的)轭。 2.环 ...
A horse collar is a part of a horse harness device used to distribute a load around a horse's neck and shoulders when pulling a wagon or plough. The collar often supports and pads a pair of curved metal or wood pieces, called hames, to which the traces of the harness are attached.