"Snarky" is used to describe speech with a specific emotional tone, typically a form of sarcasm informed by cheekiness and a mild, playful irreverence or impudence. When the dominant intent of the communication is to express or convey direct or judgmental rudeness, the sense of mild cheekiness is lost and the overall communication crosses the line to become "snide."
The young music reviewer's snarky comments about the aging rock star's choice in clothing ultimately cost her an interview with the star months later.
Audibly or visibly irritable and peeved, with a tendency towards profanity and rudeness. A combination of surly and snarling. A condition often caused by caffeine withdrawal, nicotine withdrawal, or delaying meals.
"Watch out for Dan, he gets really snarly before lunch. Yesterday I went into his office to ask for his help on a project and he told me to piss off".