What's "whatd'ya" mean?

Native speaker’s answer
Rebecca
"Whatd'ya" or "whaddya" is slang for "what do you," which is usually followed by "think," or "say," like in this video, to try to get someone to agree to something. "Whatd'ya say" here means "what do you say," which is an expression used to ask for one's opinion, in the hopes they agree. Ex: Whatd'ya say we get some drinks tonight? Ex: Whaddya think about Coldplay's new album? You like it?