Sniveller is term used for some who has rat like qualities. One who is a sniveller will usually have annoying qualities. Such qualities include a lisp , and thinking that you know a lot about a topic which you don't The sniveller usually walks around places with his neck and face toward the ground. A sniveller will most likely be an unpopular person at school or someone with a reputation which is not so great. Snivellers sometimes eat their sandwhiches with their front teeth as well , as getting mad and obnoxious over jokes. The sniveller will try and shove off the jokester and yell at them. Snivellers are nosy and bug people. They usally are techie or game people with an attitude which is horrible. They do not have downs syndrome but tend to act like they do at times.
Julian: Man that David kid is such a sniveller.
Callum: I know he's so annoying , and bothers the shit out of people. Why can't he just leave the computer room.