A couple decades ago, novelty and souvenir shops would sell stuffed parrots which would electronically record a brief clip of what they heard and then repeat it back to you.
If you said “Hello” to a parrot and then set it down next to another one, it took only a couple of iterations between the parrots to turn it into high pitched squealing.
Are there cisgender people who are not transphobic and use TERF to describe people? Asking for a friend.
Edit: To recap based on responses, transphobes do use TERF and so do cis non-transphobes.