Catatonia is a complex syndrome with unique cognitive, psychomotor, and mood features. Mannerisms and stereotypies are catatonic signs that have been extensively observed and described in the literature, mostly in the context of movements or motor acts. Stereotypies are commonly described as repetitive psychomotor or verbal acts with the abnormality not inherent in the act but in its frequency. Mannerisms, like stereotypies, are repetitive psychomotor or verbal acts, but they are fundamentally odd in nature. Recently, several reports have described these phenomena in the context of complex behaviors, such as eating and drinking. Identification and appreciation of personal and cultural norms, in addition to a careful analysis of behavioral processes and actions, are important tools for clinicians to identify these potentially elusive and often missed patterns of behavior in patients with catatonia. We present the case of a 30-year-old male with a psychiatric history of treatment-resistant, recurrent major depressive disorder with psychotic features who presented to the inpatient psychiatric unit with signs of catatonia, including repeated, purposeless eating. The patient's chart was reviewed, and a literature review was conducted using PubMed with the keywords catatonia, stereotypies, mannerisms, and hyperphagia. The patient, who was diagnosed with catatonia and expressed hyperphagia as a stereotypy, responded to lorazepam. This case shows that hyperphagia may present as a stereotypy in patients with catatonia.