Dickass

What kind of a dickass line is this: "Jeez, I, like, slopped coffee over my blouse"?

It [the Picktree brag] came also like a galloway, but more often like a coach horse, and went trotting along the “lonin, afore folks, settin up a great nicker and a whinney every now and then;" and it came frequently like a “dickass,” and it always stopped at the pond [...]