SRM is an acronym for Stark Raving Mad. It's useful to use when confronted by SRM people, when one wishes to indicate their mental state to a friend, but not let the SRM person know what you are saying.
Eddy was buying shoes from a "nutcase" in a store and wanted to let his girlfriend know what he thought of the salesperson. He wispered to her "SRM," and she immediately knew what he was thinking; even though the salesperson had no idea.
by fred ressler October 30, 2006