Rolling is the high you get from droppin` (eating/swallowing) a baum (or ecstasy). About 30min to an hour after droppin` a baum you will start to feel this relaxed, flowing body high. it'll start off soft, and then get heavier. The intesity of your high will rise (which is called peaking), and then drop a bit. Then it'll get a lil' higher, and drop a bit again. That "rolling" feeling will continue untill the high is done (between 5-8 hours).
When you get messed up off ecstasy. This is somewhat like less physical orgasms, just extreme bliss and true euphoria. Touching people feels so good, and dancing id effortless and uninhibited. It's not exactly like losing all control, you still have your morals, you just feel less obligated to follow them.
Steph was rolling face at the concert last night, she was all over that guy!