Activity specifically, and most commonly undertaken by rednecks. Examples include backyard shirtless BBQ's, Pabst cans rolling in the back of clapped out 4X4's, trucks on blocks in the front yard, etc.
"Hey Kyle, your neighbour and his friends are working on that truck every time I come up. What up?".
"Ya, he got that truck a couple weeks ago and it's been a flurry of rednecktivity ever since".