sell very quickly; a characteristic of a popular product
1) My new book, "How to Make Millions in the
Slang Business," is
selling like hotcakes
The new Pokemon game sold like hotcakes.
'hotcake' is a pancake -- flour and egg and milk cooked in hot pan. It's
not clear why 'hotcakes' are used as a model of popularity and high
demand. It's probably because hotcakes taste best when they are fresh
and hot, so when someone is cooking 'hotcakes' you have to run to get
them as they're coming off the stove.