swaggering

/ˈswæɡərɪŋ/
adjective
  1. Walking or behaving in a very confident, arrogant, or self-important way.
    • His swaggering attitude annoyed his coworkers during the meeting.
    • A group of swaggering teenagers walked down the street, laughing loudly.
    • The swaggering champion entered the ring with a smirk.
Antonyms
verb
  1. Present participle of swagger: to walk or behave with a bold, arrogant, or self-important air.
    • He was swaggering through the party as if he owned the place.
    • The young actor kept swaggering around the set, bragging about his role.
    • She was swaggering down the hallway after winning the debate.