1. To suddenly lose control of an object(s) in your hand and drop it all over the ground possibly while making a Michael J. Fox imitation.
2. To lose control and drop a thing or all things from it's container and then violenty throw the container with full force as a result.
Allan spent five dollars on dibs at Disneyland and then went dibs on said dibs while impersonation Michael J. Fox and then threw his cup violently at the trash can and bounced off and hit and nearly killed a small child.