Robot

The head of a classic robot. Commonly depicted as a vintage, tin toy robot with circular eyes, a triangular nose, knobs for ears, a light and/or antennae atop its head, and a grill-like mouth similar to a grimace. Colors vary across platform, but its head is metallic on most platforms. 

May be used of topics concerning robotics, electronics, computer programming, futurism, and science fiction. It also enjoys a range of idiosyncratic applications, such as conveying a sense of weirdness and fun as well as alarm, surprise, and excitement, given its wide-eyed, teeth-gritting expression.

Available as an Apple Animoji.