Grunt

In the 38th century, Grunts were genetically created humans with low intelligence used for menial tasks. They could become full-grown adults in less than five years. A Grunt numbered 474 was stationed on the Le Verrier space station. They were distinguished by markings on their faces, and due to their limited speech capacity, would be unable to articulate language very well and frequently leave out words when speaking to someone. Grunts could also be programmed to respond to any physical threat. This meant that no one could get physical with grunt even if they didn't not into to do harm, as it would trigger a grunt to defend itself.

Clara Oswald was disgusted by the concept of them. (TV: Sleep No More)