—used in writing to represent the sound of the phrase (I) don't know when it is spoken quickly
"What I wanted to ask about," Roy said, "is you and your mom. Whatʼs the deal?" "I dunno. We just never connected," the boy said matter-of-factly. Carl Hiassen, Hoot, 2002
"Whatʼre those things?" whispered Ron. "Dunno," said Harry. J. K. Rowling, Harry Potter and the Order of the Phoenix, 2003