nightcap

1 ENTRIES FOUND:
nightcap /ˈnaɪtˌkæp/ noun
plural nightcaps
nightcap
/ˈnaɪtˌkæp/
noun
plural nightcaps
Britannica Dictionary definition of NIGHTCAP
[count]
1 
: a drink that you have just before you go to bed at night and that usually has alcohol in it
2 
: a cloth cap that people used to wear in bed in the past