pavoneggiarsi significa in inglese

strut [strutted, strutting, struts]▼(to walk haughtily or proudly)
verb
[UK: strʌt] [US: ˈstrət]Stop strutting around at once! = La smetta subito di pavoneggiarsi!

swagger [swaggered, swaggering, swaggers]▼(to act in a pompous manner)
verb
[UK: ˈswæ.ɡə(r)] [US: ˈswæ.ɡər]