oversized animal
An animal or creature that's much larger than it would be in real life: for example, a housecat the size of a horse or even a house.
Does not necessarily apply if a person happens to be unusually tiny in comparison to the animal. In that case, you may just be looking at a miniboy or minigirl.
See also
The following tags are aliased to this tag: giant_animal (learn more).
This tag implicates animal (learn more).
The following tags implicate this tag: giant_snake (learn more).