All 4 Uses

swagger
in
Maniac Magee
(Edited)

McNab the father swaggers bare-armed out the front door, bellowing back, "Do yer homework!"
p. 133.4 *

swaggers = walks in a highly confident manner
Russell and Piper, kiddie Cobras, pop their own beer cans, guzzle, swagger, belch, smoke, curse.
p. 133.9

swagger = walk or behave in a highly confident manner
From the way the kid swaggered in, from the candy bar that jutted like a chocolate stogie from the corner of his mouth, from the rip-stone-evil scowl on his face, the kid had to be none other than Mars Bar Thompson himself.
p. 158.2

swaggered = walked and behaved in a highly confident manner
And Maniac knew that despite the swagger and the scowl and the chocolate stogie, Mars Bar Thompson was one uneasy dude.
p. 161.9

swagger = highly confident walk and behavior

Definitions:

(1) (swagger)
walk or behave in a highly confident or proud manner -- often arrogant and sometimes to impress or intimidate others

Swagger is often used to imply that someone moves or behaves as though they are so strong and capable as to be above physical fear. Such people are often portrayed on television as gang members or cowboys.
(2) (meaning too rare to warrant focus)