prance, swagger, sashay, ruffle, cock, Strout, peacock, outstrut, strut one's stuff, strunt, more...

slouch

single acting, double acting, telescopic, hydraulic, pneumatic, gas, adjustable, rigid, tension, more...

vertical, horizontal, single, diagonal, front, short, optic, long, wooden, main, rear

walk confidently,   walk with purpose,   sultry walk,   walk proudly,   walk excitedly,   walk elegantly,   confidently walk,   walk seductively,   confident walk,   pompous walk