A person who existentially resembles a speck of dry shit hanging from an ass hair of a gorilla. esp. when said person realizes this fact and sharply hones it's "skill" (i.e. propensity) in the execution of self-serving, smarmy, meaningless, petty vendettas for short term gain, which all results in a net tally of gains which equals to zero. Not even gaining an ego boost, when you consider that their devolved impersonation of an ego is not of enough value to apply. Their biggest asset, if not their only one, tends to be their "skill" (i.e. propensity) to cheat. They are metaphorically refered to as ants due to their common abundance, and refered to as being urinated on ("piss-") due to their general insignificance and lack of impact.

little no-life weasely loser who amounts to nothing.

1. An insignificant or mediocre person.

2. A tiny black ant, sometimes called a 'sugar ant.' It is called this because this type of ant is a favorite target in urinals.

A pissant is described by Kurt Vonnegut in his novel, Cat's Cradle, as follows:
"A pissant is somebody who thinks he's so damn smart, he can never keep his mouth shut. No matter what anybody says, he's got to argue with it. You say why you like something, and, by God, he'll tell you why you're wrong to like it. A pissant does his best to make you feel like a boob all the time. No matter what you say, he knows better."

Unrespectable spineless coward who amounts to nothing

Literal Term- one who pisses on ants, or one who gets pissed on like an ant.
Urban Term- a man or women who is diliked from a community.
The word pissant is used as an insult in the United States.
The word can also refer to an inconsequential, irrelevant, or worthless person, especially one who is irritating or contemptible out of proportion to his or her significance. Its origin is with pismire, a 14th-century word for ant. Its similar to the term little shit.

n. A no one; someone who has the same social statis as an ant