"Not at all", almost to the point of the suggestion being laughable. Used to express extreme disagreement with a statement, or an emphatic negative in response to a question. Equivalent to a low-voltage in digital
logic, which generally represents an assertion of a false statement.
First used by
Eric Schmidt.
Usually uttered through a laugh.
Me: Hey, you guys enjoying that last thermodynamics assignment?
Them:
ZEE-
RO!
Mom: What do you say to liver for
dinner?
Kid: Zero, mom. Zero.