The sensation a woman has when she was for a time free of conscious awareness of the male gaze and did not feel othered, but is then reminded in some way that she is a woman first and a geek, colleague, or writer, etc a distant second. That is, being grunched is the sensation of being firmly and unexpectedly othered.
There it was, the sickening grunch as I landed involuntarily back in my body- and not my entire body either, but specific parts of it.
Noun: grundle for brunch! You can get your favorite brunch items at the low-budget, saltpeter, indigestive quality, that you have come to so adamantly despise yourself for eating every day, on Saturday and Sunday mornings at the grundle.
Verb: The act of consuming grunch.
Noun: "Did he even take you out to grunch the next morning?"
Verb: "Dude, I'm wicked hungover, lets go grunch!"