Scarlett, looking at him with the affectionate contempt that mothers feel for small swaggering sons, knew that he would be very drunk by sundown.
His thickset torso was supported by short sturdy legs, always incased in the finest leather boots procurable and always planted wide apart like a swaggering small boy’s.
He swaggered among the tall O’Haras like a strutting bantam in a barnyard of giant Cochin roosters, and they loved him, baited him affectionately to hear him roar and hammered on him with their large fists no more than was necessary to keep a baby brother in his proper place.
There are no more uses of "swagger" in the book.
Show samples from other sources
The team swaggered onto the court—full of confidence.
The cowboy swaggered into the saloon with his holster unstrapped.