(Noun) a separate cake on your birthday made with the sole purpose of sobbing over and eating (usually with ones hands) as you think about how you’re another year older and still single.
“What flavor would you like your sob cake this year Laura?”

“We’re going out to dinner for my birthday then back home for the sob cake”

Person 1: “happy birthday! Why does it look like you were crying? “
Birthday girl: “i just did my sob cake”
Person 1: “oh nice!”
by Lauraflood5 November 12, 2017
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