Definition & Meaning of "bum chum"in English

What is the origin of the term "bum chum" and how is it used?

Bum chum is a slang term that appeared in mid-20th-century English to describe a gay partner or intimate male companion. The word combines "bum," a crude term for the anus, with "chum," meaning friend or companion, emphasizing a sexualized friendship or relationship between men. Historically, it could be playful within gay communities but was also used derogatorily by outsiders to mock same-sex relationships. Today it is mostly historical, and using it in modern contexts can be considered vulgar or offensive outside discussions of vintage gay slang.