IPA: //ˈswæɡərər//
KK: /ˈswæɡərər/
A person who walks or behaves in a confident and arrogant way, often showing off or trying to impress others.
He walked into the room like a swaggerer, drawing everyone's attention with his bold attitude.
Swaggerer → The word is formed from "swagger" (originating from the early 16th century, possibly from the dialectal English 'swag' meaning to sway or move heavily) and the suffix "-er" (meaning a person who). A swaggerer is a person who moves or behaves in a confident or arrogant manner, often showing off.
Think of someone who 'sways' or moves with confidence ('swagger') — the '-er' indicates that this person is one who does that.