the.com/dealbreaker

The one flaw you decided to stop negotiating with yourself about.

means A specific condition or trait that, if present, ends a deal, relationship, or negotiation outright — no further discussion.

from A straightforward compound from 'deal' plus 'breaker,' something that breaks a deal. It grew out of American business and negotiation jargon in the mid-20th century, sitting alongside its older sibling 'dealmaker,' before migrating into everyday talk about dating and relationships, where the stakes feel just as contractual.

origin
Business jargon before it colonized dating
plot twist
Usually known on date one, admitted on date five
not
A preference you are just being dramatic about
function
Lets you quit without admitting you are tired
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