Snarkcasm

harsh or bitter derision or irony combined with rudeness

a sharply ironical taunt; sneering or cutting remark in conjunction with being rude

Virulent strain of snarky sarcasm, often delivered verbally to an enemy, a nemesis, or someone you dislike intensely, and for good, rational, legitimate, and heartfelt reason(s).

Term snarkcasm has the secondary meaning: that of pointing out someone else's nasty sarcasm, that which you undeservedly, and unwarrantedly receive from another. Example, a retort to some else's vicious, snarky verbal attack on you: "Snarkcasm, snarkcasm go give yourself an orgasm!"

First Usage:

Term first coined, and utilized online, and in vernacular speech by Ian Neil Schmidt in Eastern Massachusetts, circa mid 2010's.