A combination of "ass hat" and "fuck tard". Only use this for those who meet the requirements for both definitions.
That guy wrote "I love Nancy" on his nuts, took a picture, and posted it on his myspace page. What a tard hat.
by KristynC April 14, 2006
Tardhat- acting in a childish or deminished manner. As if his head was replaced by one of a retard.
Amy whats wrong with your son? Gage is such an f'n tardhat.
by Lord of Herpes February 26, 2007