Used when there is not enough time to make proper calculations for the exact shot.
The shooter will make an educated (sophisticated) guess as to the leading of the target, the range, wind, etc.
Darrel: You got so much dick in your ass
Assface Magee: Fuck you, SWAG
Me: 'That's because you're a fucking retard trying to be like the rest of the try hards thinking their dumb ass have swag.'
The word quickly made its way to the states and has ever since become the catchphrase of douchbags and tools everywhere.
Person 2: "You're a dick"