Riffle

1. turn over something, especially the pages of a book, quickly and casually.

   he riffled through the pages

   she opened a book and riffled the pages

2. shuffle (playing cards) by flicking up and releasing the corners or sides of two piles of cards so that they intermingle and may be slid together to form a single pile.

   he riffled the deck of cards

1. an act or sound of riffling through something.

   just a riffle through the books

   the loudest sound was the constant riffle of paper as people looked at the agendas

2. a rocky or shallow part of a stream or river where the water flows brokenly.

   the river's sweeping riffles and deep pools provide a superb habitat for salmon

late 18th century (in riffle (sense 2 of the noun)): perhaps from a variant of the verb ruffle, influenced by ripple.