Kablabluh
The feeling you get when you finish something so hard it makes your brain turn into a burrito.
After that exam, my brain turned into a burrito and I ate it like it was a snack.
When I finished that 20-mile run, my brain was a burrito and I cried happy tears.
After cleaning my room for a week, my brain was a burrito and I threw it like it was a grenade.