The term "gat-toothed" is not a common expression in the English language, and its meaning is not immediately clear. However, it may be a variant of the more commonly used term "gap-toothed," which describes a person who has a noticeable space or gap between two or more of their teeth.
Gap-toothed can be used as an adjective to describe someone's physical appearance, and is often used in a lighthearted or endearing way. It can also be used to describe certain animal species, such as beavers or rodents, that have prominent front teeth with visible gaps between them.
