a stupid or contemptible person.
"we have a dumbass of a mayor"
Someone who looks up the word dumbass in a dictionary
In case you havent noticed you have fallen right into my trap you dumbass
Someone **YOU** who looks up the definition for "dumbass" on a dictionary.
You're the dumbass, YOU.
A person who looks up the definition of Dumbass
Josh is such a dumbass, he left his tailgate down while on the highway!