ハーフは英語で
mongrel

英語の定義

ハーフ
1. n. half
2. n. a person of mixed race, often Japanese

mongrel
1. 雑種, ハーフ

mongrel
1. n. (often, pejorative) Someone or something of mixed kind or uncertain origin; especially, a dog that is such.
That dog is a mongrel, who knows what breed it could be!
2. n. (slang) A thuggish, obnoxious, or contemptible person; (often, preceded by "poor") a pitiable person.