Definition of boon coon in English:

boon coon

(also boon koon)

noun

US
slang
  • A close friend.

Origin

1950s; earliest use found in The Chicago Defender. Origin uncertain; perhaps from boon + coon, perhaps influenced by boon companion and perhaps also by boo koo, variant of bookoo beaucoup [adjective, adverb].

Pronunciation

boon coon

/ˈbuːn kuːn/