buff upverb

• 1

  To improve.

  • […] Mr. Kurz was quickly seen in Europe as the poster boy of an ascendant right for a new generation, a political Wunderkind who had salvaged conservatism by borrowing the far right’s agenda, buffing it up and bringing it into the mainstream.
• 2

  To shine; to make shiny.

• 3

  To become more muscular.

• 4

  To study hard to learn a particular subject.

  • I'll need to buff up on my Italian before my trip to Genoa.