What is "ching chong"

interj. (context offensive ethnic slur English) (non-gloss definition: Mimicking Chinese speech.)

Ching chong and ching chang chong are pejorative terms sometimes employed by speakers of English to mock or play on the Chinese language, people of Chinese ancestry, or other East Asians perceived to be Chinese. Several public commentators have characterized the term as derogatory while noting that assaults or physical intimidation of East Asians are often accompanied by racial slurs or imitation Chinese.