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Jyutping mei5 daai6 bat1 diu6
Pinyin wěi dà bù diào

Definitions (CC-CEDICT)
  1. large tail obstructs action (idiom); bottom heavy
  2. fig. rendered ineffective by subordinates
Definitions (Wiktionary)
  1. phrase, idiomatic
    a subordinate becomes too powerful for their superior to control
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Wiktionary)
  1. Mandarin
    尾大不掉
    尾大不掉
    wěi dà bù diào
    • "too fat a tail to wag"; to be hampered by one's own powerful subordinates