A movie critic; one who is paid off from a major movie studio to give a fake positive fluff review. Sometimes the said "critic" doesn't even exist at all, and is just a fake name with a fake quote. Studios use this tactic as damage control for a potential flop.
"The 3% of critics who gave positive reviews for Battlefield Earth
on Rotten Tomatoes
definitely had to be plants from Warner Bros. studios. No one could ever voluntarily praise that movie without being bribed. "