It ain’t tasty, and it ain’t fun. It’s garlic (Allium sativum)!
Take one small garlic clove. Peel it, cut off the ends, and then pop it in your mouth. Gently crush it with your teeth from time to time. The volatile oils released are very powerful bug killers that will search and destroy the enemies of your oral pharynx (and other places).
May also be used to keep people away when you need some alone time.