Runneth Over is an origin trait in Destiny 2 that can appear on 22 weapons. An enhanced version exists on crafted and some newer weapons.
What Runneth Over does
Reloading near allies overflows the magazine. Bows receive faster draw time and Swords receive faster charge rate.
Enhanced version
Reloading near allies overflows the magazine an improved amount. Bows receive improved draw time and Swords receive improved charge rate.