Colin, the term flossing is another term for bottom bouncing the Fraser for sockeye, only the 'flossing kind of bottom bouncing' does not get the fish to bite. That, and the fact that some guys now floss chinook in the Fraser and then will floss any salmon species silly enough to crack its mouth in most any river system is why many have become to call it 'snagging'. A dispuse surrounds the 'snagging' handle because sure, it's a method of snagging, but currently it cannot be enforced like someone using a triple hook attached to a spark plug would.
SO, there are different opinions on what to call it though so Im glad you asked as it can be confusing when all these different terms are used, especially terms that describe methods where the fish actually bite.
Love those things! Are they floss dispensers?