1 definition by Bill Forrest
To outstandingly destroy or defeat an opponent or obstacle, especially when the odds are against the one blaining. Term was originally thought up by Dan and Tom, better known in the Halo community as the Ogres. The word Blain itself comes from the last name of the famous magician David Blain, who has on many occasions "Blained" the laws of physics and the limits of human anatomy. So to Blain is to perform a crushing victory in a situation in which defeat is almost certain.
by Bill Forrest April 1, 2007