When you use flirting to convince someone to join your side in an argument or to win an argument

A ultimate rank of perfection and freshness that only certain individuals hit.

cool, someone can be sway or something article of clothing can be sway

Its another world for "fam"

Sway is everything that swag is plus more.Sway is having swag plus a big hairy pair of balls that sway back and forth when you're struttin' your swag.

To reach a level of swag that is so swagged out it is on another level, which is sway

For a complete definition, see the deleted scenes from Spike Lee's 25th Hour. (Does not lend itself to paraphrasing.)

"Sway helps you make money and money helps make you sway. But sway is not money."