Snarky (adjective)

1. Irritable or short-tempered in manner.
2. Sarcastic or cynical in tone or attitude.

Origin:

From snark + -y.

Examples:

1. The snarky comment was not well received.
2. The snarky tone made it difficult to take the speaker seriously.
3. The snarky attitude made it hard for others to approach him.
4. The snarky remark was not appreciated by the audience.
5. The snarky response was not appropriate for the situation.