Suck it, baryons, some mesons are heavier than you are. And tetraquark sounds fine enough to me, especially if the more exotic pentaquarks and heptaquarks turn out to be more than physicist fantasies and reclaim the lost weight... err, mass of baryons. (Too bad they couldn't account for the missing mass of the universe. Then baryons would be the real victors. Alas, that is impossible.)
Whatever, a particle that's charm anti-charm down anti-up sounds... Intriguing.
P.S. Is this indeed confirmed to be a tetraquark? Previously discovered particles like Zc(3900) are also suspected to be tetraquarks, but haven't been confirmed to be such as of yet(?)