someone who is usually always irish with intreguing blue eyes. As with most irish people, he is almost always easier to figure out while heavily induced with alcohol. You're never sure if you want to date this person, or aviod them at all costs. Brian generally has no enemies, but at times is intensely disliked by his friends. He is great at making you feel big emotions, while using small words, and half ass'd glances.
That Brian is like great sex with your husbands best friend: highly addictive, and usually brings guilty feelings later.