This meaning refers to various frog-like amphibians, especially members of the family Bufonidae.
A toad hid beneath the garden stones.
The toad moved slowly toward the pond.
This broader zoological use applies to multiple squat amphibians that resemble true toads, even if they belong to different groups.
Several unrelated amphibians are commonly called toads.
The species is a toad rather than a true frog.
This insulting figurative meaning compares an unpleasant person to the animal.
The villain is portrayed as a selfish old toad.
Do not call him a toad simply because you disagree.