No, a human cannot outrun a hippo. Hippos are surprisingly fast despite their large size. They can run at speeds of up to 30 km/h (19 mph) on land. In comparison, the average human running speed is about 10-15 km/h (6-9 mph), with the fastest humans reaching up to 45 km/h (28 mph) in short sprints. However, even the fastest humans would struggle to maintain that speed over a distance, whereas a hippo can sustain its speed for longer periods.
Hippos are also very aggressive and territorial, especially when they feel threatened. If a hippo charges at you, it is unlikely that you will be able to outrun it. It is always best to keep a safe distance from hippos in the wild to avoid any dangerous encounters.