This is Carnotaurus sastrei, a theropod that seems to be little more than a mouth with a set of legs to carry it around. Carnotaurus belongs to an aberrant group of theropods called abelisaurs, which dominated much of the southern hemisphere during the Cretaceous. While all abelisaurs appear odd to our tetanuran-biased eyes, it seems like Carnotaurus is striving for weirdness as a means to its own end; as if it were making some sort of meta-commentary on abelisaur diversity.