The acts of going hard, doing something better than you think anyone else can, out-doing yourself, and exceeding your previous limits in any and all aspects of life. This term can apply to ANYTHING you do just as long as you're doing it with all of your strength and ability. Don't be a pussy.
"Damn dude I was GETTIN IT last night! I woke up this morning with no pants on, 2 girls passed out in my hotel room with me, empty bottles everywhere, and all my money spent. I'm about to GET IT again tonight!"
"My boy just got laid for the first time and he's 31 years old! He's finally GETTIN IT bro!"
"I gotta get out, grind, and make some more money today. Every day I'm just out GETTIN IT. If you ain't out GETTIN IT, you should be out GETTIN IT!"