brassmaxxing 

The act of learning as many brass instruments as possible in as little time as possible.

James started brassmaxxing last week and he already learned tuba and French horn!

brassmaxxing by VernonMCLoud October 3, 2022

Brainmaxxing 

Doing out of pocket things to be more smarter like eating weird foods and learning useless facts that no one knew

Yo bro I've been brainmaxxing and I defo feel smarter now.
-What do you know now?
You're short and Egypt is the oldest African civilization in the world.

Brainmaxxing by TheGuyyXD (VORTEZ_Waze) December 21, 2023