Extemporaneous Speaking (Extemp, or EXT) is a speech delivery style/speaking style, and a term that identifies a specific forensic competition. The competition is a speech event based on research and original analysis, done with a limited-preparation; in the United States those competitions are held for high school and college students. In a Extemporaneous Speech competition, enrolled participants prepare for thirty minutes on a question related to current events and then give a seven-minute speech responding to that question. The extemporaneous speaking delivery style, referred to as "off-the-cuff", is a type of delivery method for a public presentation, that was carefully prepared and practiced but not memorized.

Extemporaneous speech is considered to have elements of two other types of speeches, the manuscript (written text that can be read or memorized) and the impromptu (making remarks with little to no preparation). When searching for "extemporaneous", the person will find that "impromptu" is a synonym for "extemporaneous". However, for speech delivery styles, this is not the case. An extemporaneous speech is planned and practiced, but when delivered, is not read. Presenters will normally rely on small notes or outlines with key points. This type of delivery style is recommended because audiences perceive it as more conversational, natural, and spontaneous, and it will be delivered in a slightly different manner each time, because it’s not memorized.