She/he/they be bruhing is said when you see someone doing something weird, unusual, amazing, crazy. Or anything really. You can use this anytime, anywhere.
The act of accidentally rubbing your breasts (if a woman) or your shaft and balls (if a man) up against someone when trying to get past them in a crowded area.
1. Brooke just got done brushing brunswicks with half the people in line at the snow cone machines!
2. Bryan: this totally hot, busty woman just got done brushing brunswicks with me