Scare quotes are quotation marks (") used around words or phrases to show that they are being used in an unusual way. For example, if someone says, "I have a 'good' reason not to go," it means that the person doesn't really consider it a good reason at all - they are using the word "good" in a sarcastic way. You can use scare quotes to show that you're using a word in a funny or strange way and it won't really be taken seriously.