Brinergy 

Brian + energy = Brinergy
Or brain + energy = Brinergy

Wow, you have some impressive brinergy right now.

You wish you had this clever brinergy.

Brinergy by LingDanc803 May 14, 2023

Brainergy 

The lack of energy you get late at night or when very tired that inhibits you from thinking straight.

I'm running out of brainergy to finish this essay tonight.

Brainergy by Maffa April 27, 2009

Brenergy

Bro Energy...like when youre at a party with a bunch of bros and the energy between all of the guys reaches an ultimate high...

Dude our brenergy is soooo huge right now broseph! We should totally do that crazy shit again sometime!

Brenergy by three-muscka-bros May 25, 2009