A maggot is a small, wriggling insect that eats rotting food. You might also think of it as a larva – that's what baby insects are called.
Maggots come up often when people talk about garbage or dead animals. For example, if you're cleaning out your trash can and find some squirming creatures in the leftover pizza, those could be maggots. Or, imagine you're on a camping trip and notice some flies buzzing around a dead fish; those flies might lay eggs that hatch into maggots eating away at the flesh. You don't usually want maggots around because they help spread disease.
A soft, legless larva of a fly or other dipterous insect, that often eats decomposing organic matter.
