To go off like hot cakes: i.e., rapidly.
1860. A reporter present said:All classes [in Charleston] are arming for the contingency of coercion. Revolvers and patent fire-arms are selling like hot cakes.O. J. Victor, The History of the Southern Rebellion, i. 46 (1861).
1861. The next [day], down came an order for a dozen baskets [of the wine], and it goes off now like hot cakes.Knick. Mag., lviii. 259 (Sept.).