literally "fox's tail", referring to a visible sign of evil intentions or the evidence that reveals someone's bad nature

the tail of a horse

to be arrogant or self-important; to get stuck-up

to leave a matter unfinished or unresolved; to fail to handle a task thoroughly

(idiom) a rabbit's tail cannot grow long; used to describe someone or something whose power or influence is about to end, or whose days are numbered

(colloquial) to leave a task unfinished; to hinder someone or hold others back from making progress

to lose an investment or be swindled out of all of one's money; to have a loan go unpaid with no hope of recovery

to tuck one's tail between one's legs; to back down or behave submissively when in a humiliating situation

the tail of a pig, or the same used as an ingredient in cooking

to have one's tail between one's legs; to act timidly or like a coward to avoid trouble

having a bare or missing tail; used to describe animals that have lost their tail feathers or fur

(slang) a person who puts on an act, such as feigning innocence or pretending to be helpful and concerned.

literally a rat's tail; figuratively refers to a follower of inferior stature or low social standing

To grow a tail

A project that is mostly done but has some small parts dragging on unfinished, which prevents the whole project from being completed.

To make a clean break with the past by eradicating long-held bad habits, outdated thinking, or errors