nightcap

A warm cloth cap worn while sleeping, often with pajamas, being common attire in northern Europe before effective home heating became widespread.

• Winston wore a nightcap to stave off the cold.

A beverage drunk before bed that is usually alcoholic.

• I'll make myself a nightcap of whisky and lemon before heading to bed.

Something that a person reads or listens to before bed.broadlyfiguratively

• "[…] and as a nightcap I happened to pick the copy of Plato […]"

The final match of a sporting contest, especially the second game of a baseball doubleheader.US

A cap drawn over the face of the condemned person before they are hanged.historical

To drink an alcoholic beverage shortly before retiring to bed.intransitive

• Even better than breakfast, though, is nightcapping at the Waffle House . Nightcapping happens after the bars close, but before the southern sunrise: the hours when their jukeboxes play “Freebird” on a continual loop, […]
• We nightcapped at the Four Seasons Hotel George V, on the most extravagant cocktails I'd ever purchased in life.