Using "snide" and "remark" together, a snarkster is someone who uses sarcasm, irony and/or acerbic (sometimes cruel) wit as a tool or weapon to express him or herself because they typically suffer from some sort of deep self-loathing or insecurity.
One can often observe snarksters online (blogs and other
social media) and immediately
recognize their total disregard for anyone who doesn't agree with them, think like them or "get them".
Since a snarkster lacks
originality in his/her humor, they frequently resort to insulting others with impressive
vocabulary, behaving condescendingly and displaying a not-so-subtle smugness; basically feeling very pleased with themselves after they dish out their remarks to others.
While snarksters have high IQs and higher educations, they are generally inept at empathy, sympathy or diplomacy. Additionally, they rarely get laid.
In a nutshell, a snarkster is basically the result of a bitter, awkward geeky youth growing into a bitter, smug adult asshole.
Dick and Jane use irony and sarcasm on occasion. They are witty.
Meanwhile, Timmy thinks that by using both all of
the time, he appears cool, clever and funny. He isn't. He's just a snarkster... and an asshole.