Now you're talking spoken language informal
Used when someone's offer or suggestion or what they have said is better than one they mentioned previously
A: Do you want chicken for dinner? B: No, I had it last night. A: How's about fish? B: Now you're talking.
A: OK, I will let you stay here until tomorrow. B: Yeah, now you're talking!
A: I have to find a job. I don't want to live on my parents' financial support anymore. B: Now you're talking.
To understand what someone is trying to say and agree with them
Used to share ideas or opinions in common with other people in public
Express agreement in an impatient way; all right!; that's enough
So as for a negotiation to be successful, both parties must agree.
Most people voted for favoring something
Used to allude that the last force, problem or burden which is seemingly minor and small causes a person, system or organisation to collapse or fail
Her husband's violent act last night was the straw that broke the donkey's back and she left him