the first is To Completion.

The second is No Quit No Spit.

The third is No Quit With Swallowing.

or else she is going to go around with your cum in her mouth for the rest of her life.  Not too likely.

To completion means that you can come in her mouth, but she is likely to run to the bathroom shortly afterwards and spit it out, or grab some nearby tissues and do the same.

The WS is the clearest of all of what is going to happen.

Of all the various activites involved with acronyms, I think this one is the most YMMV sensitive of all.

If you want to help your odds, drink lots of pineapple juice.

Some providers don't want you to cum in their mouth, so they'll tell you to let them know right before you cum so they can withdraw. To me, that's BBBJTC. It requires perfect timing for optimum execution - should be an Olympic event.