When someone gets a tattoo, piercing, crazy haircut, or any other fashion addition as a lame attempt to fit in socially.
Ex 1 : Jason got his social branding when he got his penis pierced so he would fit in with his buddies down at the Blue Oyster bar.
Ex 2 : When Chuck started hanging out with the biker crowd he gave himself a social branding by having Harley tattoos plastered to his arms.