Monkey see Monkey do. When one monkey gets an idea after seeing a triggering action. The meme comes from the game ancestors and is used to display a monkey image looking at a sexual or funny image with the term as the caption.
*Monkey sees thicc woman*
NEURON ACTIVATED
21👍 2👎
Basically, booba = return to monkey
Guy 1: Dude, I saw some booba last night!
Guy 2: neuron activation!11!!1!