From Peter Lynn:

Some words and phrases I’m getting a little tired of:

Killer app.: Unless the technology functionally resembles
the HAL 9000 computer from “2001,” it’s not a killer application.
It’s just a tired phrase.

Diva: Being used today to discuss almost any female singer
or demanding star, it should strictly refer to female opera stars.
Elton John is not, and cannot be, a diva — no matter how bitchy he
acts. The term “prima donna” has already been extended to refer
to tempermental, conceited people, so let’s please retain the precision
of “diva”.

Fashionista: What a pretentious word! Surely Che Guevara
would roll in his grave at the thought that the “-ista” suffix used
by freedom-fighting guerrillas has been co-opted by those in the fashion
industry, as if their escapades on the runways of Milan are of the
same importance as the struggle for liberty in the jungles of Latin
America.