Hudnut (hud' nuht) - n. The leftover bolt or screw in any "some assembly required" project.
Officially a Sniglet "Kids in the hall" fame.
What is that hudnut doing on the floor, I thought we were finished building this.
To get a bloody nose from getting a basketball dunked on your head when you had no business being in the lane.
I thought I was going to get the rebound, but instead I got hudnutted when the other player jumped over my head, dunked the ball, and elbowed me in the face. I should have known not to go for that rebound.