ironic

Characterized by or constituting (any kind of) irony.

It's somewhat ironic to have a wave of smog right on Earth Day.

It was ironic I forgot my textbook on human memory.

Characterized by or constituting (any kind of) irony.

It's ironic that we are eating a sandwich in Sandwich, Massachusetts.

Acting in an unserious and teasing manner.

Don't take it personally. We're just being ironic.

Done in an insincere and mocking manner; satirical.

You should assume that everything this guy posts is ironic.

Here’s a tip: If a group of people start using something as ironic hate speech, it will eventually be used for unironic hate speech. Don’t act surprised.