What does Scoop mean in poker?

Scoop in poker means winning the entire pot in a game where the pot can normally be split into high and low halves.

How does it work?

The term matters most in split-pot formats such as Omaha Hi-Lo. If a player wins both the high and the low, they do not split the pot with anyone. They scoop the whole thing. In practical terms, it is one of the best possible outcomes in that kind of hand, because the player takes everything instead of only half.