Derived from the word, 'konnichiwa.' Neech is a slang, derogatory term for a person from asian and/or oriental descent. These people are often recognized for being short in stature and tend to be driving Kia Rio's or other foreign vehicles. A neech can be a person with poor driving skills, selling items on the black market, and are generally carrying around gadgets that are confusing just looking at. Additionally, a neech will only speak english when directly spoken to, otherwise they speak their own dilect which is rude, considering they are in america, though it can be humorous.
"Look at the neech in the Honda"
"Listen to that neech's funny accent."