Definitions of swagger:

noun: an itinerant Australian laborer who carries his personal belongings in a bundle as he travels around in search of work
noun: a proud stiff pompous gait
verb: act in an arrogant, overly self-assured, or conceited manner
verb: to walk with a lofty proud gait, often in an attempt to impress others
verb: discourage or frighten with threats or a domineering manner; intimidate
adjective: (British informal) very chic
name: A surname (very rare: popularity rank in the U.S.: #31033)