puss (n.1)

"cat," 1520s, but probably much older than the record, perhaps imitative of the hissing sound commonly used to get a cat's attention. A conventional name for a cat in Germanic languages and as far off as Afghanistan; it is the root of the principal word for "cat" in Rumanian (pisica) and secondary words in Lithuanian (puž, word used for calling a cat), Low German (puus), Swedish dialect katte-pus, etc. Applied to a girl or woman from c. 1600, originally in a negative sense, implying unpleasant cat-like qualities; but by mid-19c. in affectionate use.

puss (n.2)

"the face" (but sometimes, especially in pugilism slang, "the mouth"), 1890, slang, from Irish pus "lip, mouth."

Others are reading

Definitions of puss from WordNet

puss (n.)
obscene terms for female genitals;
Synonyms: cunt / pussy / slit / snatch / twat
puss (n.)
informal terms referring to a domestic cat;
Synonyms: kitty / kitty-cat / pussy / pussycat