goat是山羊，play是玩，那play the goat是什么意思？千万别理解成“玩山羊”，也不是我们小时候玩的“跳山羊”。
act/play the goat
act/play the goat是一个俚语，
剑桥词典对它的解释是：
to behave in a silly way
做蠢事，举止愚蠢。
【例句】
He would be quite a likeable fellow if only he wouldn't act the goat so much.
如果他没有干那傻事，他会是一个十分讨人喜欢的家伙。
act the giddy goat可以表示：瞎胡闹
【例句】
If you will act the giddy goat in front of your friends you must expect them to treat you accordingly.
如果你对朋友嘻嘻哈哈瞎胡闹，你该想到他们也会这样对待你。
old goat ≠ 老山羊
goat 除了山羊，还有“色狼；色鬼”的意思，所以，old goat = 老色鬼
【例句】
The old goat was giving her the glad eye.
那个老色鬼在向她抛媚眼。
get sb's goat
get sb's goat不是“得到某人的山羊”，而是指：激怒、惹怒某人。
也可以说：get on sb's goat
【例句】
What did you do to get his goat?
你做了什么惹他生气了?
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