Swager - pronounced with a long "a" - that is, rimes with "cage" not "cap". It is tool used to crimp or bend metal. The other definitions were poor definitions of Swagger - notice the second "g" causing the word to rime with "cap" not "cage".
Anglers use a swager to crimp sleeves onto fishing line to make a secure loop at the end of the line. If they do it well they are entitled to swager