出典:Wiktionary
Onomatopoeic, originally representing characteristic syllables of Chinese, such as Mandarin's qing and chong, Cantonese's cing1 and cong1, Hokkien's chheng and chhong, and etc, as heard by English-speakers, and reinforced by perceptions of other Asian languages, especially with existing surnames of Chinese origin, such as Ching/Cheng and Chong/Chung.
This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.
ching chong
The term will often be pronounced or performed with unusual exaggeration, cadence and emphasis to mimic perceptions of East Asian languages; the user may consider the term humorous or a crass joke.
ching-chong
a syphilitic (patient)
くび
クマネコ類
binturongs
シャクガ
woodpeckers
a rope
ジーバングス
geebungs
サンカノゴカイ
muntjacs