spicy tooth

an eye for an eye, a tooth for a tooth

compensation for injury caused by a person, in the form of inflicting of an identical injury on that person.

clean as a hound's tooth

Very clean.

hen's tooth

Anything not naturally occurring.

long in the tooth

Old; aged.

salty tooth

A liking for foods that are salty.

sour tooth

A liking for foods that are sour.

spicy

Scandalous.

sweet tooth

A liking for foods that are sweet; a weakness for sweets.