open season on
A period of unrestrained criticism or attack on something or someone, as in During an election year it's open season on all officeholders. This expression alludes to the period during which one may legally hunt or fish. [Colloquial; c. 1900]
Words nearby open season on
open reduction,
open registry,
open sandwich,
open sea,
open season,
open season on,
open secret,
open sentence,
open sesame,
open set,
open shop