antis
oppositional
the one-line answer
The collective group of people who oppose a celebrity or fandom.
Antis is the plural and collective noun. When you say the antis you are referring to the organized opposition as a group.
mainstream
Your coworker might use this word.
01 / in the wild
hear it move.
fandom
the antis are trending her name again.
The people who oppose her are pushing her name in a negative context on Twitter.