Technical Definition-Short for "Bread and butter." Usually refers to the easiest, most used combo for any character but can be extended to the most used strategy as well. A BnB combo should follow the "10 out of 10" rule meaning it can be hit 10 out of 10 times in tournament play.
In Other Words-"I'm doing this rush all the fucking time now! This is the coolest shit in the fucking world!"-Steven "Destiny" Bonnell