Let's learn about "친구 구분"

1. Normal words (일반어)

(1) 친구 (friend)

남자 친구 : boyfriend

여자 친구 : girlfriend

(2) 사친 (personal friend)

남사친 : male friend

여사친 : female friend

(3) 우정 (friendship)

죽마고우 : childhood friend; old friend; bosom buddy[pal]

2. Slang words (속어)

1) 남한(South Korea)

(1) 불알친구 / 부랄친구 / 알친구 : childhood friend between male and male

* 불알 / 부랄 / 알 : the testicles of a man

(2) 공알친구 : childhood friend; bosom buddy[pal]; bosom friend between female and female (가슴친구)

* 공알 : the clitoris of a woman; feminine genitals <-- 공(空: 없다=be without) + 알(ball; testicles)

* 가슴 : bosom

2) 북한(North Korea)

(1) 빤스친구 : childhood friend between male and male

* 빤스 : [=팬티] underpants

(2) 송아지적 친구 : childhood friend; bosom buddy[pal]; bosom friend between female/male and female/male

* 송아지 : calf; young cow; calves

* 송아지적 : 송아지 + -적(when); calfish; when childhood