To embarassingly sabatoge one's own chance at success moments before acheivement by becoming overly confident and showing off. Derived from U.S. snowboarder Lindsay Jacobellis' tumble at the 2006 Olympics.
Jimmy pulled a major Jacobellis the other day. He was almost at the finish line for the 400 meter, then he started dancing, and tripped. The other runners stepped on him, and he came in last. Poor Jimmy.
1. To cost oneself athletic glory and sentence oneself to a lifetime of smarmy people using surname as a verb, esp. through youthfully hubristic hot-dogging.
When you act older than you really are. Aches, pains. etc are exagerated and injuries occur often. Slow movements and being stuck in past styles such as black and white TVs, VCRs, and 30 year old cars.
That nutty bastard got hurt playing shuffle board and pulled an iacobellas by missing 2 months of work.