a box full of cock, this can be used in reference to someone who does a stupid act (must be male)

A board, usually footed by side boards, thus creating a low table, under which a man slides his naked body. Centered in the top board will be some variant of a hole through which he will insert his erect penis and his testicles. This creates a "dancefloor" for a woman who will stand on, crush and otherwise torture the exposed and vulnerable organs, often while wearing stiletto heels.

stupid or annoying person.

vagina, squish mitten, coochie, vaginal cavity,

(military) The "cockpit" from where an unmanned airplane is flown. The cockpit resides on the back of a hummer and resembles a large box. Hence, "cockbox."