Euphemistic exclamations are words or phrases used to express surprise, shock, or dismay without using profanity. Common examples of these expressions include 'HECK' and 'egad, ' both of which are four-letter words. HECK is an informal way of expressing surprise or dismay, while egad is a more old-fashioned expression of shock or dismay. Both words are used as substitutes for stronger language, and are considered more socially acceptable than profanity.