The Cupcake emoji shows a small cake in a paper wrapper with frosting on top. It means cupcakes, baking, dessert, birthdays, or something cute and sweet.
It may be used as an affectionate nickname, especially for a partner or child. Calling an adult "cupcake" can also sound teasing, patronizing, or mildly threatening, as in "listen, cupcake," so tone matters more than the frosting suggests.
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