It started during the opening number by West's G.O.O.D. music group, which included Big Sean, Pusha T and 2 Chainz. There were long moments of censored silence when the rappers performed "Mercy," though not all the offending words were bleeped out.
The censor police also worked overtime when Rick Ross performed with his Maybach Music Group and during Minaj's performance and acceptance speech for best female hip-hop artist. Minaj's win was her third consecutive time taking the prize.
"I really, really appreciate BET for keeping this category alive, and I appreciate all the female rappers doing their thing, past, present and future," she said, before uttering an obscenity.
Presenters included Taraji P. Henson, Tyler Perry, Kerry Washington and Jamie Foxx, who wore a T-shirt that had a picture of Trayvon Martin, the Florida teen killed by neighborhood watchman George Zimmerman.
Rev. Al Sharpton received the humanitarian award, and urged the crowd to vote this November.
"This election is not just about Obama, this is about your momma," he said.