A nickname for NBA player Devin Booker, known for his smooth and accurate shooting.
Often used in basketball and rap culture to describe someone with a "wet" (highly accurate) jump shot.
"Man, your jumper is clean—shooting like Book!"
"Shots that I took, wet like I'm Book." – Drake, "SICKO MODE"
"He dropped 40 last night! Straight Book status."
(Alternative meanings like "booked" for getting arrested or "book it" for running don’t apply here.)