What Exactly is "Tacking" of a Breast?

The most common way to fix a bottoming out breast implant is to use internal sutures, a procedure called a capsulorrhaphy. Some surgeons have used external stitches placed on a temporary basis but this is uncommon. "Tacking" is not a medical term so I don't think any of the respondents here can tell you exactly what your surgeon has in mind.

Thank you for the question.

Although difficult to know for sure, based on your description I think your surgeon is planning a procedure called capsulorrhaphy.  This involves the use of internal sutures ( usually permanent) to correct the implant malposition issue.  

As a patient, you should not hesitate to ask questions about the procedure,  potential complications and success rates. Ask the surgeon to see previous patient examples as well. Doing so will give you peace of mind prior to your surgery.

Best wishes. 

Tacking of the fold I think is what he was referring to. This will close down the pocket and reconstruct the fold.