A slang word used to describe someone that displays characteristics of a middle-eastern terrorist. The typical attire of an amer is a keffiyeh, ski mask, and bomb vest.
It has been said that the original creator of the term used it to describe a kid that looked like a ferret. However, the term has evolved over time.
G - Check that amer out, he looks like a muskrat!
S - Wow, that's embarrassing