How do you say night cap in French?

There isn't a direct translation for "nightcap" in French that refers to a drink before bed.

Here are some options, depending on the context:

For the drink itself:

* Un dernier verre (a last glass)

* Un digestif (a digestive) - This implies a drink specifically meant to aid digestion.

* Un petit quelque chose (a little something) - This is a more informal way of saying a drink.

For the action of having a nightcap:

* Prendre un dernier verre avant de se coucher (to have a last glass before going to bed)

* Se faire un petit quelque chose avant de dormir (to have a little something before sleeping)

For the item of clothing:

* Une toque de nuit (a nightcap)

Choose the phrase that best fits the context and your desired level of formality.