tar and feather

1. Literally, to coat someone with tar and bird feathers as a form of public punishment and shaming (a practice that fell out of use in the early 20th century). The mob tarred and feathered the thief in the public square before parading him through the town strapped to a wooden cart.

2. By extension, to severely criticize, reprimand, or excoriate someone, especially in a public and humiliating manner. Everyone is demanding that the government tar and feather the bank executives behind the scandal, but I'd be willing to bet that all they'll receive is a slap on the wrist.

tar and feather someone

If you tar and feather someone, you criticize and embarrass them very badly. These newspapers are ready to tar and feather innocent celebrities.