riffle (Verb) — Twitch or flutter. ex. "the paper riffled"
riffle (Verb) — Look through a book or other written material. ex. "He riffled through the report"
riffle (Verb) — Stir up (water) so as to form ripples.
riffle (Verb) — (card game) shuffle (playing cards) by separating the deck into two parts and riffling with the thumbs so the cards intermix.
riffle (Noun) — A small wave on the surface of a liquid.
riffle (Noun) — Shuffling by splitting the pack and interweaving the two halves at their corners.