When someone is expressing a large magnitude of rage, often over something relatively small, that the stress they are giving upon themselves causes their hair to fall out (thus, balding). Portemanteau of "mad" and "balding".
When someone is so mad they start balding.
xQc is malding while playing Overwatch
Someone that is getting so mad, that he starts balding.
holy shit, xQc is malding over Overwatch rn
Someone that is getting so mad, he starts balding.
xQc is usually malding by playing Overwatch.