Human

Humans are tiny, usually bipedal organic beings from the planet Earth. Though quite weak, fragile, and technologically backwards, they have sometimes aided the Autobots and thwarted the Decepticons once their age-old war spilled onto the humans' primitive homeworld.

Also know as: fleshlings, squishies, and "dumb stubbies."

From Teletraan I: The Transformers Wiki, a Wikia wiki.