A "vehement critic" is someone who expresses strong and passionate disapproval or disagreement with something or someone. They strongly and forcefully criticize it or them.
Sentences with «vehement critic»
But Pyott would make an ironic choice to run Valeant, given he was one of the most vehement critics of the company and Ackman in 2014, when Valeant teamed up with the hedge fund manager in an unsuccessful hostile takeover attempt of Allergan. (fortune.com)
To add such requirements would either have required creating a new statewide regulatory body in California, or would have required allowing animal control shelters to exercise a degree of discretion in approving «adoption partner agencies» which many «no - kill» sheltering proponents believed would lead to the animal control shelters disqualifying their most vehement critics. (animals24-7.org)