An male retard from the region of South Wales. Said person can be characterised by a lack of logical thought, natural stupidity and an incredibly small penis. A Dean Tucker will usually have few/no friends, with a ridiculous hairstyle and a horrible taste in music and fashion.
"Do you think my pink shoes will go with my brown top?"
"Dude, you dress like a Dean Tucker"
"My friend told me im an argumentative, self-righteous twat"
"You are. You constantly argue things even when you know you're wrong. Truthfully, you're one hell of a Dean Tucker.