蝎子拉屎,毒粪 蠍子拉屎,毒糞 蠍子拉屎,毒糞

a scorpion defecates: poison (unique) dung (portion)

Saying俗语俗語

Two-part saying歇后语歇後語 · Rarely used now

May offend: vulgar language

Meaning
Means there is only one such thing, one of a kind, with no other source or branch. Humorous.
Wordplay
毒 (dú) sounds like 独 (dú, 'sole, only'), and 粪 (fèn) is close to 份儿 (fènr, 'share, portion'), so 'poisonous dung' sounds like 'the only one'.
Simplified
蝎子拉屎,毒粪
Traditional (Taiwan)
蠍子拉屎,毒糞
Pinyin
xiēzi lāshǐ, dú fèn
Bopomofo
ㄒㄧㄝ ˙ㄗ ㄌㄚ ㄕˇ,ㄉㄨˊ ㄈㄣˋ

Written with HSK 7-9 vocabulary, at CEFR level C1.

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