The term 'Bug Repellent' can be summarized by the crossword solution DEET, which is a chemical compound used in insect repellents. DEET was developed by the United States Army in 1946 and has since become the most widely used insect repellent in the world. It is effective against a wide variety of insects, including mosquitoes, ticks, fleas, and other biting insects. DEET is available in various concentrations, ranging from 4% to 100%, and is often used in combination with other insect repellents for maximum effectiveness.