What does 2 Peter 2:10 mean?
In prior verses, Peter wrote that the Lord knows how to keep the unrighteous for punishment until the coming day of God's judgment. Here, he adds that this is especially true for those guilty of two things. One is indulging in sexual sin and despising—living in contempt of—authority. As this passage continues, it will become clear that Peter is specifically referring to the false teachers among the Christians in the church. He is comparing them to the sinful men of Sodom and Gomorrah (2 Peter 2:6–8).The specific sexual sins these false teachers did, and urged others to do, may have differed from the men of Sodom. Both, however, were guilty of unrestrained sexual expression. They were living in defiance of God's commands and His instructions on the right way to live. Peter calls them bold and daring, arrogant and willful, unafraid of the consequences of what they were doing and teaching.
Apparently, these false teachings also included some condemnation of spiritual powers. Peter uses the Greek noun doxas, which the NIV renders as "celestial beings," the ESV as "glorious ones," and the NASB as "angelic majesties." We don't know the specifics, but what Peter will condemn in the following verses is the irreverent and clueless arrogance with which these men delivered their false message.
God would not allow that to go unpunished.