what say you

Short definition from Wiktionary

Phrase

1. 1
   What do you say? What is your opinion?
2. 2
   What do you say? What is your opinion?: When addressed to a defendant in court: how do you plead? Also, when addressed to a jury or its foreperson: what is your verdict?
3. 3
   Sometimes followed by if: how about or what about (something)?
4. 4
   Followed by to: do you fancy, or would you like (something, such as an activity or a drink or a food item)?