James J. Cramer is a prominent American television personality, author, and former hedge fund manager. He is best known as the energetic host of CNBC's "Mad Money," where he offers aggressive investment advice to the public. Cramer co-founded the financial news and literacy website TheStreet.com and has authored several best-selling books on investing. His boisterous style, characterized by sound effects and catchphrases like "Boo-yah!", has made him one of the most recognizable figures in financial media.