The act of taking the virginity of a girl. The term comes from the fact that the hymen, before being torn, most frquently looks like an inverted flower.
After the rainbow party, Mary said she was tired of being the only virgin in the seventh grade and asked me to deflower her. We went up to her room while her family was playing Jenga. She was tight and there was blood everywhere from her ripped hymen. She was so sore that I had to pull out early, so she cleaned me up and finished me with a blow job.
A nun who has lost her virginity, usually through sexual intimacy with another member of the Clergy, but who carries on with her duties as if she were chaste.
Joe: "Man, that babe is hot. I wish she weren't a nun."
Dan: "No worries, man. I hear she's a deflowered nun."