底橫 [－横]

Jyutping dai2 waang4
Pinyin dǐ héng

Definitions (粵典–words.hk)
  1. 名詞
    即​係​底​褲​（​量​詞​：​條​）
    underpants; underwear; literally "bottom horizontal"
Definitions (Wiktionary)
  1. noun, Cantonese, slang
    underpants (Classifier: 條／条)
    (syn.) 底褲, 底橫, 褲頭兒, 內底褲, 內面褲, 底褲仔, 底底, 底褲 male briefs, 伴子, 內褲, female, 身底褲, GT - General Taiwaneseno specific region identified), 內褲 GT, 內褲 male boxers
Definitions (Kaifangcidian)
  1. 內褲 – 内裤

底橫 [－－]

Jyutping dai2 waang4
Pinyin dǐ guāng

Definitions (CC-CANTO)
  1. noun; briefs, underpants