Once after a D&D game I DMed a player asked me "how are you doing?"
"fried" I responded.
"oh no! satisfied though?"
I took a moment to think about it, and responded "No, Satis-FRIED"

I use this term when I hit brain fog/ executive dysfunction after hyper fixating for a really long time. Instead of feeling unproductive, I feel proud of my accomplishments and let myself rest.