any issue or factor that is significant enough to terminate a negotiation, esp. in business or politics
The proposed financing between the prospective investor and the entrepreneur could be a deal breaker.
In the '60s South, long hair was a signifier and a deal breaker for men.
This isn't a deal breaker, it just requires a little extra effort to partake in the main reason to choose this destination.
For Aga Malarczyk, 37, one of more than 50,000 Polish citizens living in Scotland, this is a deal breaker.
Such squishiness on social issues is not inherently a deal breaker for the Republican base.