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In page Shuffling:

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This method is similar to 52 pickup and also useful for beginners. Also known as the Chemmy, Irish, wash, scramble, hard shuffle, ice cream, smooshing, schwirsheling[citation needed], or washing the cards, this involves simply spreading the cards out face down, and sliding them around and over each other with one's hands. Then the cards are moved into one pile so that they begin to intertwine and are then arranged back into a stack. Statistically random shuffling is achieved after approximately one minute of smooshing.[1]