shamer

shame +‎ -er

shamer (plural shamers)

1. One who disgraces someone or makes them feel ashamed, especially by public criticism.
   • 2021 April 7, Conor Friedersdorf, “The Sexual Identity That Emerged on TikTok”, in The Atlantic‎, archived from the original on 2021-04-07:

     The longer social-media shamers condemn preferences that the overwhelming majority of people share, the more inevitable the pushback.

2. (obsolete) Something which makes someone feel ashamed.
   • 1647, Beaumont and Fletcher, The Works of Beaumont and Fletcher‎, volume 5, published 1812, page 284:

     My means and my conditions are no shamers / Of him that owes 'em, (all the world knows that,) / And my friends no reliers on my fortunes.

• Hamres, Mahers, Maresh, Mehras, Ramesh, harems, masher, rhemas, shmear