Hulkism

Hulkism is a condition where the afflicted will hulk out under extreme conditions, most likely being "Rage" as its trigger.

"Hulking Out" is a key symptom of the affliction, as the afflicted can "Hulk Out" into a huge version of themselves at the expense of mental capabilites for a certain period of time.

Currently as shown, Hulk Kid, Hulk Mama, and Hulk Dad are proven to be the ones afflicted by hulkism, but Barack Obama is actually a canon Hulkism Sufferer. And from Hulk dad's research videos, its possible that Wolves in Chernobyl have also been affected with Hulkism.

The Origins of Hulkism date back to the Chernobyl incident, as thats the known earliest date where Hulkism is known.

As of now, Hulk Dad is actively trying to figure out the truth behind Hulkism as a whole, going so far as to study affected Tartigrades, and tinker into his mind, possibly gaining control over his own mind when he hulks out.