An elliptical conditional of faltar, “to be lacking”; context supplies the implied objection.
An elliptical conditional of faltar, “to be lacking”; context supplies the implied objection.
What does faltaría más mean?
It can mean “of course” or “absolutely not”, depending on context.
Why are the meanings opposite?
The tone and the proposal determine whether the speaker welcomes or rejects it.
How does it answer a polite request?
It readily grants the request.
How does it answer an outrageous proposal?
It rejects it indignantly.
Is it a literal statement about something missing?
No. It is a fixed conversational response.