1
general::
1. Would you like, as in What about another beer? or What about a game of bridge? 2. What do you think of, as in So what about renting that white house on the corner? 3. Why, concerning what, as in I need your frank opinion.? What about? 4. what about it? What should we do, what course of action should be taken. For example, We're supposed to be there at noon and bring two sandwiches each? now what about it? [First half of 1900s] Also see HOW ABOUT.
American Heritage Idioms
2
general::
Phrase(s): What about (doing) something?
Would you like to do something? • What about going on a picnic? • What about a picnic?, Phrase(s): What about (having) something?
Inf. Would you like to have something? • What about having another drink? • What about another drink?
McGrawhill's American Idioms And Phrasal Verbs