A dd is a person with a bum on the back of their head. It is called a DD because if you turn around the two D's it makes the image of a bum.
"Hey look at the back of his head"
" Hes definitely a DD""
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug