It a branch off the word "Common Sense" with a similar meaning pertaining one of Brian Zhang's Sense. Now "Common Sense" is defined: " The term should speak for itself. A Sense which SHOULD be common to everyone. Usually refers to any sort of logic that should be obvious to anyone." "Brian Sense" is a sense in which only can only come from Brian. It is knowledge like there is no hunting P90, when a car is on and stopped its RPM are at ZERO, and that motorcycles are less dangerous then cars.
"Aw man my Brian Sense in telling me that motorcycles are less dangerous then car, and that automatic cars have no E-brake."