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.
From Wikipedia, the free encyclopedia. Blue waffle is a fictional sexually transmitted disease said to affect only women, causing severe infection and blue discoloration to the vagina. The disease has been confirmed as false. According to Dr. Elizabeth Boskey, the fictitious disease may have started around March 2010 after an image of a gentian violet stained vaginal yeast infection was circulated by the shock website Documenting Reality.