A person who will undertake the act of being a sleaze at any opportunity. This is accentuated when the sleazeberry is under the influence of alcohol, and can reach dangerous levels when there is both alcohol and large numbers of attractive members of the opposite sex in the vicinity.
John Calipari, a person who lies, cheats and steals to get what they want. A person who knowingly violates rules to prosper as long as they don't get caught. A person who manipulates others to join in their unethical behavior.
A person with no character. A person with no ethics, or is unethical. A dishonest person.