diaper cake 

a present left in a baby's diaper as a result of their poopy being in the shape of a small chocolate cake

Tyler just smushed his diaper cake when he fell on his ass in the sandbox!

diaper cake by Ms. Carter3 January 24, 2011

Diaper Cake 

it's a thing where you stack diapers to look like a cake

I looked up "diaper cake" and am disappointed that it's a thing where you stack diapers to look like a cake and not a cake that looks like a diaper

Diaper Cake by Yonkers Homeboy January 18, 2019

Diaper Cakes 

Stacked useable baby necessities (mainly diapers) shaped into a form of a cake. They make a lovely centerpiece or decoration for a baby's room. Almost all part of the cake may be utilized by mom and baby and may match the theme of a party or baby's room.

Bebe Cakes makes the best diaper cakes, check them out at lovebebecakes.com

Diaper Cakes by Bebe Cakes June 12, 2011