Etymology
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potty (adj.)

"crazy, silly," 1916, slang, of unknown origin, perhaps connected to potter (v.), or to pot (n.1) in its association with alcoholic drinking. Earlier slang senses were "easy to manage" (1899) and "feeble, petty" (1860).

potty (n.)

1942, child's word for "chamber pot," from pot (n.1). Potty-training is attested from 1944. Potty-mouth "one who uses obscene language" is student slang from 1968.

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Definitions of potty
1
potty (adj.)
marked by foolish or unreasoning fondness;
Synonyms: enamored / infatuated / in love / smitten / soft on / taken with
potty (adj.)
(British informal) trivial;
potty little details
potty (adj.)
slightly intoxicated;
Synonyms: tiddly / tipsy
2
potty (n.)
a plumbing fixture for defecation and urination;
Synonyms: toilet / can / commode / crapper / pot / stool / throne
potty (n.)
a receptacle for urination or defecation in the bedroom;
Synonyms: chamberpot / thunder mug
From wordnet.princeton.edu