A form of audible punctuation usually indicating disbelief or sarcasm. Exhalatives are usually added to the end of a sarcastic sentence. Various dialects can indicate various nuances of the level of distrust or sarcasm. Exhalatives are formed by forcing a short exhale through pursed lips sounding like "pfffff" or through the tongue pressed against the roof of the mouth creating "Pssssh" or "Chsssh" or a combination. While spelling may vary, the exhalative exists in all modern languages.
An IRS agent called me to today to tell me he would like to help me with my tax return. Pssssh. Riiight. Pardon my exhalative, but the IRS is gonna help me???? ...Pfffff.