hotcake
US /ˈhɑːt.keɪk/
UK /ˈhɑːt.keɪk/

1.
a pancake, especially a thin one cooked on a griddle
:
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She served a stack of warm hotcakes with maple syrup.
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The smell of fresh hotcakes filled the kitchen.
1.
something that sells very quickly and in large quantities
:
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The new smartphone is selling like hotcakes.
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Tickets for the concert are selling like hotcakes.