A "cypher" refers to a cyclical way of free-styling where one person starts when another is finished, without any interruptions.
Check out Miranda's tweet about the event below:
Warning: you haven't really seen me in cypher mode be4. I'm different. You know how when Bruce Banner gets heated... https://t.co/Ie5d1w5LDj
For more information on the BET Hip-Hop Awards, click here.