Brain, mind, thoughts.
From 30 Rock:
Jack: Jack Welch has such unparalleled management skills they named Welch's Grape Juice after him, because he squeezes the sweetest juice out of his workers’ mind grapes.
Liz: That doesn’t even make sense.
Jack: No, it doesn’t, does it. I wrote it down in the middle of the night.
Tracy (to writers): What else is on my mind grapes?
Tracy (to Kenneth): I got something on my mind grapes I need to talk to you about.
Another term for the mind or the brain. Made popular by the TV show, 30 Rock.
Jack: (Practicing for a charity dinner) Jack Welch has such unparalleled management skills they named Welch's Grape Juice after him because he squeezes the Swedish juice out of his workers' mind grapes.
Liz: That doesn't even make sense.
Tracy: What else? What else is on my mind grapes?