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1 definition by Aitch

 
1.
BSG
Brian the Shit Guy. This is used for people named Brian who are really a pain in the ass and could even be called dickfucks. They're generally not too bright, sorta smell, and dress funny. But lets keep it quiet, 'cos BSG's are often very short-tempered.
"BSG you aren't too bright, sorta smell, and dress funny."
by Aitch April 05, 2005