sarcasm with an extra dose of snark: a biting remark that goes beyond mere snark or sarcasm, the preferred method of communication for professional smartasses
Sarcasm: "I only come to Jiffy Lube for the free coffee."
Snark: "Well, at least the price is right."
Snarkasm: Asking the Jiffy Lube cashier if she ground the beans herself.
Sarcasm: "Gee, thanks. I've always wanted a Chia Pet."
Snark: "I hope you kept the receipt."
Snarkasm: "Were they out of fruitcakes?"
Sarcasm: "So where's the rest of it?"
Snark: "Five inches is huge if you're 11."
Snarkasm: "Jesus! My mother has a bigger penis."
While the comment, about a third person, "Yeah, that's really going to work," is just conventional sarcasm, the same comment, directed at the person will exaggerated inflection, "Yeah, that's REALLY going to WORK," slips into snarkasm.
A joining of Sarcasm and Snarky to form a belittling, condescending, unpleasant, sharp, bitter, scornful remark or gesture.
I told the police officer , "with my years of driving experience and quick wits I have at least the same level of competence when dealing with different driving situations." to which he snarkastically laughed in my face.