A fork of Rural Dictionary
Some one with a large bean. The bean of a person is the area of their head that starts at the base of the back of the ear and continues to the back of the head. Someone with an extortionately sized bean can be expected to be ridiculed for having that back of head resembling those madlad aliens from the popular move franchise Alien.
'Yo, Ashton has some chonky beanhead.