folks who take nothing serious, but I'm biassed because I'm one of the former.
People who live through their phones or people who bitch constantly?
(try choosing between them - I'll be surprised if you can seperate them)
teachers.
tramps (homeless guys) or bitchy women?
You know the kind I mean; short, glasses, always with snide remarks and bitchy looks, never seem to serve any kind of usefull purpose.