Shuttling is where one man places his butthole up against another mans butthole and takes a poop. that poop is transfered from the first mans butthole to the second mans butthole without ever seeing daylight.
i walked into the bathroom and caught these two guys shuttling
Doing triple digits on an interstate or major highway with all four of your windows down.
Me and Nick were shuttling on the Garden State Parkway on the way to the Jersey Shore...then we got pulled over.