老屁股 [－－－]

Jyutping lou5 pei3 gu2
Pinyin lǎo pì gu

Definitions (Wiktionary)
  1. noun, Xiang
    old fellow; old codger
    (syn.) 老家伙, 老契涸, 老趁统, 老釘釘, 老貨, 老家私, 老钉钉, 老货, 老趁統