A short thing
A tiny human that makes your life a living hell. They're younger than 13 and have the energy of a thousand screaming raccoons.
My cousin is a short thing. He wakes me up at 6 a. m. every day and yells about Minecraft.
That short thing in my class talks nonstop and won't shut up during math.
My neighbor's kid is a short thing. He peed on my lawn and called me a grandma.