Breasts that are only fat or a result of being fat; when a woman's clavicle and/or collar bone aren't defined but she has a full chest; a woman has chubcakes when you can't tell where her shoulders ends and her boobs begin.
Jessica Simpson's chubcakes look like my fat uncle's ass crack.
Part of the skinny white boys with wavy dark hair category, the 'Chubcakes' is often racist, sexist, and everything-else-ist. He gets away with this tomfoolery because he is also what people call 'Adorablecakes'. Fluent in making the orange sound, he is able to adorable-fy girls everywhere.
Some Chubcakes also come with a cane accessory.
Random Girl: "Did you hear that guy? He just told me to get back into the kitchen!"
Other Girl: "What a Chubcakes!"