refresher

noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about refresher at Wordnik → Where our words come from →

1. A fee (in addition to that marked on the brief) paid to counsel in a case that lasts more than one day.
2. A drink that refreshes.

   he stopped at the bar for a quick refresher

3. A course that reviews and updates a topic for those who have not kept abreast of developments.