A person of low intelligence, extreme annoying tendencies, and a severe lack of talent; completely oblivious to their faults.
"Dude, when I told you to get us a pizza, I didn't mean to go out and buy a freakin' Lunchable. You're a total dunkel!"
You're such a dunkel that before you were born, you're mom asked if you were going to be a boy or a girl, and the doctor replied, "neither, you're giving birth to a healthy baby dunkel."
Noun: The mixture of shit and semen as a result of dunkeling.
"That girl is so hot I'm afraid I might just dunkel in my pants!"
Noun: "I wouldn't mind cleaning up the VIP room if it wasn't covered in dunkel."
"There was so much dunkel it smelled like the bathroom in a freshman guys' dorm. "