Top Definition
Creepy-ass little bugs that "swim" across the floor in Riley Residence Hall at WPI. Also known as "Silverfish".
Ryan (who lives in Riley): "So you know what happened today? One of those damn Riley-bugs crawled on my folder and died. Just up and died."

Patrick (who lives in Morgan): "What the hell is a Riley-bug?"
by P-Bobby October 11, 2010

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