Roast Beef Thieving is the act of stealing Roast Beef from Arby's. A friend will park to far away from the window at the drive-thru and as the lady/man leans out the window to give them the food another friend runs from behind the car and swipes the food. As he runs and jumps into a third friends car the first friend complains that an unknown man just stole his food. That man recieves his food and you re-group with those who stole the food and that's what we call the double.
"So we were all hanging out late last night and got hungry but only had six dollars between us. So we pulled the R. B. T."