D-positive
A D-positive is a person who is so dumb they think they're cool. It's like calling someone a brain-dead donkey with no sense.
My cousin said I was D-positive because I tried to eat a whole pizza in one bite.
My teacher called me D-positive after I spelled 'cat' as 'act'.
At the mall, some guy said I was D-positive because I wore socks with sandals.