riffle shuffle

riffle shuffle (plural riffle shuffles)

1. (card games) A technique of shuffling a deck of playing cards by first separating the deck into two parts.
2. (mathematics) A permutation that models the outcome of a riffle shuffle; the operation of dividing an ordered set into two equal subsets and then alternately listing sequences of elements from each subset that have a common specified length.

riffle shuffle (third-person singular simple present riffle shuffles, present participle riffle shuffling, simple past and past participle riffle shuffled)

1. (transitive) To perform a riffle shuffle.