A medicine or drug.

(slang) A medicine or drug, especially a narcotic or other recreational drug.

one day

(honorific) to give / (honorific) to do something for me/us

下さる: to give

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

all you can drink

drinking party

to chug; to down

chugging; downing