老襟 [－－]

Jyutping lou5 kam1
Pinyin lǎo jīn

Definitions (CC-CANTO)
  1. the name two or multiple male address each other if they have sexual relationship with the same woman (spoken)
Definitions (粵典–words.hk)
  1. 名詞、俚語
    指兩個​男人​同​同一​個​女人​有過​性關​係​；​襟​兄弟
    two people who have had sex with the same person
Definitions (Wiktionary)
  1. noun, Cantonese, derogatory
    males that share a female sex partner
  2. noun, Cantonese, Liuzhou, Mandarin, Nanning, Pinghua
    husbands of sisters
Definitions (Kaifangcidian)
  1. 連襟 – 连襟