Pseudomyxoma peritonei (PMP) is an uncommon surgical entity, characterized by diffuse deposition of mucin within the peritoneal cavity secondary to mucinous tumors of the ovary or appendix. This gelatinous ascites or "jelly-belly" may result in death from loss of intestinal function and intestinal obstruction. Preoperative diagnosis on cytology is rare. Herein, we report a case of PMP in a young male who presented with intestinal obstruction, diagnosed preoperatively on cytological examination, and confirmed later by histopathological examination.