Other children may tease the child or use the term "harelip."
It may be helpful for parents of a child with a facial cleft to meet with his classmates and teachers to explain the history of the term harelip.
Although a facial cleft was once referred to as a harelip to reflect its similarity to the mouth of a rabbit, the term is considered insulting today.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.