When ever a female (or a male) takes violent anal sex and the remains can be accurately described as a "circle bacon". It is called a circle bacon because the 'ring' around the anus resembles a circle of heavily cooked bacon.
Hey bro, I went over to Becca's last night and gave her some serious anal sex. I think I gave her a circle bacon, bro.
by Tra Na Pha October 18, 2011