adjective

deliberately hurtful in one’s remarks; spiteful.

catty comments

spiteful,malicious,mean,nasty,cruel,unkind,snide,backbiting,hurtful,wounding,barbed,cutting,hateful,ill-natured,bitter,venomous,vitriolic,poisonous,acid,hostile,rancorous,vindictive,vicious,defamatory,slanderous,bitchy,malefic,maleficent