Definition: Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.
Input: In conversation sometimes I'll say something like this: What's that do? which uses 's' as a contraction for 'does'. Is this a 'real' contraction, or is it incorrect usage of a contraction?.
Output:
According to Merriam-Webster and Dictionary.com, 'what's' is short for: 'what is' (What's the matter?) 'what has' (What's happened to the car?) 'what does' (What's that mean?) So it appears that 'What's that do?' is grammatically correct. Merriam-Webster: what's Dictionary.com: what's