When one places a miniature picnic table on the floor, lies next to it, and rolls until their shoulder crushes the picnic table. (The shoulder dive should take place in front of the small child that made the picnic table).
Reasons for the shoulder dive may include: wanting to feel big and strong, picnic tables piss you off, the small child was being a bitch and had it coming
The act of rushing through a crowd of people and slamming your shoulders into strangers as you hurry to a destination.
I was shoulder bowling people all day because my boss had me rushing back and forth between the office and the factory. blocking, crowd blocking, shoving, pushing, ramming, hitting