A Leary biscuit is a snack consisting of a cracker, cheese, and a marijuana bud. It is heated in a microwave oven to activate the tetrahydrocannabinol (the active ingredient in cannabis) and cause a cannabis "high" in the eater. Timothy Leary was reportedly fond of these concoctions, even in the later years of his life, and thus they are named for him.
See also: Alice B. Toklas brownie
