As a native English speaker I didn't know "gimp" was more than a nonsense word and a lowercase version of this program until your comment. I admit I grew up sheltered and that probably influenced what slang terms, especially unkind ones, I learned about, but otherwise I don't consider myself particularly deficient in the vocabulary department.

Offensive word for someone with a physical disability or leg injury, a stupid person, or (not sure if it's okay in this context) a submissive person in BDSM activities, according to the New Oxford American Dictionary.