Duolingo is the world's largest online language learning platform. It was recognized as Apple's iPhone App of the Year of 2013 as well as Google Play's Best of the Best of 2013 and 2014. Duolingo's adaptive experience has gamified elements to make language learning more fun and effective. 200 million students are learning a language with Duolingo.
Definition of waffle. : a crisp cake of batter baked in a waffle iron.
Blue waffle â An Internet hoax originating in 2010 purporting an unknown sexually transmitted disease affecting only women, causing severe infection and blue discoloration to the vagina. The disease has been confirmed as false.