>>22144020Since it isn't a Christian practice the answer is academic. Which is why you'd get a much better answer out of practicers of circumcision. But if you really want to know what it signifies in Christianity it's about a cutting away of the flesh, forsaking ones' desires brought on by temptation in obedience to God.
Circumcision is the mark of the covenant with Abraham. Stephen told a crowd of cut men they had uncircumcised hearts and ears. Meaning they were not part of the covenant.