腹はら下くだり

Meanings

1

noun, noun or participle which takes 'suru', intransitive verb

Colloquial term for diarrhea; often used in casual conversation. Can be used as a noun or with する to mean 'to have diarrhea'.

腹はら下くだし
腹下し is a medicine or substance that causes diarrhea (a laxative or purgative), while 腹下り is the condition of having diarrhea.
下げ痢り
下痢 is the standard medical/formal term for diarrhea, while 腹下り is a more colloquial and somewhat old-fashioned expression.

Compound of 腹 (hara, 'belly') + 下り (kudari, 'descending'), literally 'belly descending', referring to loose bowels.