1. When someone looks amazing or really put together, especially if extra effort has been put in
2. When someone does something really well, often used as a compliment
Originates from when a girl scoops her boobs up in her bra to make them look more perky when she's trying to look extra good
Wow, you just scooped the boob with that presentation bro, nice job.
Hey girl, you really scoop the boob in that dress.