屁股蹲兒 [－－－儿]

Jyutping pei3 gu2 deon1 ji4
Pinyin pì gǔ dūnr

Definitions (Wiktionary)
  1. noun, Mandarin, dialectal
    fall on one's bottom; sitting down hard
    (syn.) 顿跋坐, 顿龟, 頓大坐, 頓龜, 頓大龜, 顿大坐, 顿大龟, 顿坐坐, 頓跋坐, 頓坐坐

屁股蹲兒 [－－－儿]

Jyutping pei3 gu2 deon1 ji4
Pinyin pì gu dūn r5

Definitions (CC-CEDICT)
  1. (dialect) a fall on the buttocks
  2. pratfall