To tag along for a ride one way or both ways to a certain location.
Sometimes just used to get to one destination, usually just a one way trip.
Compensation offered may consist of taking turns driving, splitting the cost of gas, or trade.
There are some websites that offer forums for people to search for open seats/rides offered all across the world. One of these sites is www.AtoBme.com.
Gary and I were bored one day so we thought it would be fun to surf through www.AtoBme.com and Hitch-A-Ride with someone heading out of town.