"Fox News is the nation's leading purveyor of fast food opinions."
Often originating from best selling books on said topics written by authors that disregard scholarly objections to their opinions and instead focus on the criticism of the groups they are critiquing.
Also commonly originating in politically motivated cable television shows masquerading as news broadcasts, the opinion based article section of a newspaper, and rhetoric blaring radio shows.
It's hard to take him/her seriously when they just spit out fast food opinions they heard on _____ last night.
I thought he/she had an unusually volatile opinion about ___ and when I asked him/her to explain it they seemed unable to understand what they had just said. I think it is safe to say they have fast food opinions.