The physical and emotional reaction to doing something particularly shameful.
"What's a 'shame attack?' Like what happens after you do something particularly shameful ... like getting shot down by a 34-year-old."
A reaction of embarrassment/ self-hatred.
I can't believe I spent £150 in Primark on Saturday, I'm having such a shame attack!
I'm having a major shame attack! I can't believe I did that!
Whatever you do, make sure you don't get a shame attack in the second post. You've done nothing to feel bad about.
He had a major shame attack when I found out he'd been chirpsin other girls.