one-drop

Noun

one drop (uncountable)

1. A style of drumming, prevalent in reggae and attributed to Winston Grennan, in which the snare and bass play on the same beat.
   • 1995: You have different intricate things that you do with your high hat while your bass drum and your snare might be playing the same beat, like the one drop, where the bass drum and the snare drum is playing identically. — drummer Nelson Miller interviewed by Carter Van Pelt in The Roots Is In...