doo-doo dunderhead
Very dimwitted
They're the dumbest of the dumb, the stupidest of the stupid. They're doo-doo dunderheads.
doo doo dunderhead
someone who has a small penis and tries to suck it every night and cums out small amounts into his butthole. Likes to lick penis hole. When he is erected it shrinks even more than when soft.
he is such a doo doo dunderhead