I think you are asking "What is a Tubal Ligation?"
A tubal ligation is the ligation or cutting of the fallopian tubes in a female to prevent pregnancy. It is done in the operating room under general anesthesia and is considered a permanent, although not always 100% effective, means of Birth Control.
Also it is sometimes referred to as "tying the tubes" or "having my tubes tied".
Typically, the surgeon will actually remove a portion of the tubes and seal off the ends of the tubes so that there is no longer a passage for the egg to pass through.
It's very rare but it can happen. Tubal ligation has less than a 2% failure rate but if you feel that you may be pregnant you should see a Dr immediately because you are at a much higher risk for ectopic pregnancy.