STRUT, verb intransitive

1. To walk with a lofty proud gait and erect head; to walk with affected dignity.

Does he not hold up his head and strut in his gait?

2. To swell; to protuberate.

The bellying canvas strutted with the gale. [Not used.]

STRUT, noun A lofty proud step or walk with the head erect; affectation of dignity in walking.