troll
trōl
verb
verb: troll; 3rd person present: trolls; past tense: trolled; past participle: trolled; gerund or present participle: trolling
1.
informal
make a deliberately offensive or provocative online posting with the aim of upsetting someone or eliciting an angry response from them.
"if people are obviously trolling then I'll delete your posts and do my best to ban you"