To get a buzz on through alcohol,
drugs, or both. And as the buzz wans, you take a little more to
bump your buzz back up. Doing this multiple times is known as ridin' a buzz because essentially you're in a constant state of being semi-intoxicated by continually drinking over a course of
time, but not too drunk or veggin' out.
This is similar to a bender in that you can
ride a buzz ad inifitum, however, being buzzed and wasted are too different animals. Also this should not be confused with ridin' a bus, but this can be done while doing that.