Twitter creator Jack Dorsey appeared to subtweet competitor Facebook over its recent name change, seemingly referencing the company’s announcement with a series of jokes about the new “Meta” moniker.

Dorsey, who co-founded Twitter in 2006, poked fun at Facebook’s Thursday announcement that it would rebrand under its “Meta” parent company, tweeting a definition of “meta” as “referring to itself or to the conventions of its genre; self-referential,” and retweeting fast-food chain Wendy’s announcement that it was “changing [its] name to Meat.”