The term "jiver" is slang that is often used to describe a person who is deceitful or manipulative. There are several synonyms for the word, including trickster, swindler, cheat, deceiver, and con artist. These words all describe someone who uses deceit or lies to take advantage of others, whether through financial scams, emotional manipulation, or other means. Other synonyms for "jiver" might include hustler, shyster, fraud, or smooth talker. Regardless of the specific term used, it's clear that jivers are not to be trusted, and should be avoided whenever possible.