gut reaction

I have a very gut reaction to things and if it's not a 'Hell yes!' it's usually a 'No'.

Jehlárová’s gut reaction when the Cougars reached out to the Czech Republic native to gauge her interest in coming to the United States?

"This way, we're measuring gut reaction to the light turning on -- which hand will you use on the spot?"

It was a gut reaction at having my identities seemingly collapsed into an acronym.

This gut reaction will, most certainly, not stop me from going back at my earliest convenience to stock up, provided there are any left.