Verb, to speak without thinking to reporters or members of the press. Famous press junkers are Bob Dylan and Terrell Owens. The term was first coined in Zach Braff's Garden State.
"What was your dream job growing up?" - Reporter
"To be a waitress," - Dylan
"What are you going to do here in Denmark?" - Reporter
"Look for Hamlet's castle," - Dylan
Dylan could really press junk-it.