when a person is a series of mean. containing jerk and ass and some one who diserves a throat punch. and the fist part makes it sound a little more real.
1. lauren is a jerkasserfist becuase she ate my last cookie.
2. what a jerkasserfist, that guy just totaly ran a stop sign and hit my on my bike.
A very large jerkoff-half dinosaur like human of the Upper Cretaceous Period of North America, characterized by having strong wrists and a large head. Also know to some Canadian dwellers as jerkoffskie