The BET Hip Hop Awards, which aired tonight, featured “cyphers” from all-star rappers. Kendrick Lamar apparently “killed it” with his performance.

The freestyle included lots of dissing. Because, you know, that’s kinda what it’s all about.

Lots of others viewers took to Twitter to heap praise on him. Kendrick’s name was trending late into the night in the U.S. and other parts of the world.

But others wondered what a “cypher” was exactly. They were not alone.

So, here is Kendrick’s verse in case you needed to get up to speed:

Doctor Dre approved: