go non-linear

go non-linear

To become energetic or agitated by something, often an interest that one has. You know Grandpa loves talking about the weather, so don't ask him about it unless you want to hear him go non-linear.
See also: go
Farlex Dictionary of Idioms.

go non-linear

become very excited or angry, especially about a particular obsession. informal
This expression may have originated as a humorous play on the phrase go off the rails (see rail).
See also: go
Farlex Partner Idioms Dictionary
See also:
  • launch into
  • launch into (something)
  • go on for an age
  • go on for ages
  • get riled up
  • hold forth
  • be riled up
  • be/get riled up
  • rile
  • frosted