Presser

A “presser” is a press conference. “Newser/presser—a press conference” was defined in a 1994 book about the media.
 
“Presser” less frequently means a press release. This use is of an uncertain date.
 
   
Wiktionary: presser
Noun
presser (plural pressers)
1. (media, slang) A press release
2. (media, slang) A press conference or press briefing.
 
Google Books
On Deadline:
Managing Media Relations
By Carole Howard and Wilma Mathews
Prospect Heights, IL: Waveland Press
1994
Pg. 49:
Newser/presser—a press conference.
 
Google Books
How to Succeed in Newspaper Journalism
By David Stephenson
London: Kogan Page
1998
Pg. 27:
Press conferences
We will now look at two popular ‘set pieces’, the first of which is the press conference or ‘presser’ as it is sometimes known (it is also known as a news conference).
 
Google Books
Essential Radio Journalism:
How to produce and present radio news
By Paul Chantler and Peter Stewart
London : A & C Black
2009
Pg. 90:
News conferences (often called a ‘presser’ for ‘press conference’ ) can be a free-for-all. Some are relatively well organised in a hall or conference room, but be aware that they are inevitably controlled by the company, authority or club running them.
 
Real Clear Politics
Posted on September 17, 2012
Romney Holds Presser On Tapes: Obama’s Plan “Attractive To Those Who Don’t Pay Taxes”
 
BaltimoreRavens,com
Posted: Jan 2, 2013
Presser: Ray Lewis’ Full Retirement Announcement
Ray Lewis announces his retirement at the end of the season.