Brain Sweat 

When you think about something so intense that you feel like your brain is sweating.

Tina was thinking about all of the furniture that she needed to move and she broke out in a brain sweat.

Brain Sweat by Whosit606 March 6, 2020

Sweater Brains 

Human thought organs possessed by human females which allow them to solve problems for themselves and which cause many problems for human males; most notably an inability to maintain eye contact.

Some might refer to these organs, and the wily intuition they seem to possess, as Chesticles

Her career rise has been meteoric because she has displayed a fine mind and even keener sweater brains.

Sweater Brains by Random Ness October 5, 2011

Sweater Brains 

What a guy REALLY means when he talks about being attracted to intelligent women.

Guy 1 to girl at a bar: I've always been attracted to intelligent women. I'll take brains over looks any day!
Guy 1 to guy 2, whispering: Yeah, sweater brains!

Sweater Brains by JMcDon June 9, 2011