4 ms·noun 1. British Slang. a foolish or contemptible person. I would say Source Safe is your best bet.by recursive 12y agonoun 1. British Slang. a foolish or contemptible person. I would say Source Safe is your best bet.boie0025 12y agoAhh, thanks, good looking out. "safe" seems like an additional layer of perceived good intentions.brewdad 12y agoIt could also mean you have something to hide. Something of great value.