Sometimes I use words that I've heard out of context, sometimes I use words just because they sound fun and sometimes I modify fun words. Yesterday I used another slang rendition of snarky: "snarkiness." Someone tried calling me out that "snarkiness" wasn't a word...but I assure you that it's at least modified from one.
The definition of "snarky," according to Dictionary.com:
snark·y (snär'kē) Pronunciation Key
adj. snark·i·er, snark·i·est Slang
1. Rudely sarcastic or disrespectful; snide.
2. Irritable or short-tempered; irascible.