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If someone has a gammy leg or a gammy knee, that part is , stiff, or painful, and it does not work as it should. People say it in British and Australian English, usually with a small, kindly smile — not as a doctor’s word. You will hear it from older speakers talking about a bad hip, a football knock, or a knee that has never been quite right. It is almost always used of a leg, knee, hip, or sometimes an arm; you do not really say a gammy idea or a gammy day. It is informal, a little old-fashioned, and it can sound gently comic. Do not put it in a formal letter or a science report; limp, sore, or is safer there. It does not mean the person is lazy. It means the body part itself is in a poor state.
瘸的、不靈便的（英式口語，多形容腿或膝蓋隱隱作痛）
組成Origin obscure and uncertain. It may come from the old North Midlands word game (“lame”), from Welsh cam or Irish cam (“bent, crooked”), perhaps by way of Shelta; some also compare Old Occitan gambi (“lame”), related to gamba (“leg”). Treat any one story as a guess.
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
gammyadj詞源 1/ˈɡæmi/
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Injured, or not functioning properly (with respect to legs).
- I have got a gammy leg, and can't walk far.
- However, I had been doing a lot of walking and my gammy leg began to give me trouble.
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obsoleteslangFake; counterfeit.
- A little bit of real lace would be fixed on this as in process of making, and a lot of "gammy" stuff, imitation lace, would be carried with it.
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obsoleteslangBad; unfavourable.
gammynoun詞源 2/ˈɡæmi/
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Grandmother.
- Had our beloved gammy lost it?
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。