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To chortle is to laugh because you are or pleased — a happy little sound in the throat, not a huge laugh and not a mean one. It often shows delight at a joke, a trick, or your own cleverness. Lewis Carroll made the word up in the poem Jabberwocky; the public first saw it in 1871 in Through the Looking-Glass. People think he blended chuckle and snort. Writers still like it. In speech it sounds a bit colourful and a bit old, but everyone understands it. You can also call that laugh a chortle. It is not an angry snort, and it is not a polite fake laugh.
得意地輕笑、咯咯笑（開心、甚至有點自鳴得意，不是狂笑，也不是冷笑）
原始詞典資料3 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。
chortlenoun/ˈt͡ʃɔɹtəl/
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A joyful, somewhat muffled laugh, rather like a snorting chuckle.
- He frequently interrupted himself with chortles while he told us his favorite joke.
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A similar sounding vocalisation of various birds.
chortleverb/ˈt͡ʃɔɹtəl/
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To laugh with a chortle or chortles.
- The old fellow chortled as he recalled his youthful adventures.
- 'O frabjous day! Callooh! Callay!' He chortled in his joy.
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。