An abbreviation for "b***job, nap, and cookie", usually used to express intensely relaxing and recharging after a stressful day by fulfilling one's needs for pleasure, rest, and food.
Employee #1: "What is up with Jake? He's been really taking it out on everyone this afternoon. I've never seen him this wound up."
Employee #2: "He's been doing a lot of overtime on that special project we got stuck with and the boss has been breathing down his neck. He just needs to go home and get a BNC; he'll be fine tomorrow."