a night owl (idiomatic)

(euphemistic) job in the nightlife / sex industry

(Internet slang, humorous, pun) Christmas Eve, as a night of sexual activity between young couples

(collective, literally) a thousand nights / (archaic, figuratively, collective) lots of nights; an innumerable number of nights

a female given name

panda / Abbreviation of 熊麝香猫.

everyone and their dog; literally “cats and ladles too”

to give something valuable to someone who does not understand that value: to cast pearls before swine

a Schrödinger's cat

(idiomatic) tiny, not enough room to swing a cat; literally, “a cat’s forehead”