A hype man in hip hop music and rapping is a backup rapper and or singer who supports the primary rappers with exclamations and interjections, and who attempts to increase the audience's excitement with call-and-response chants.
Music writer Mickey Hess expands the term as follows: "a hype man is a figure who plays a central but supporting role within a group, making his own interventions, generally aimed at hyping up the crowd while also drawing attention to the words of the MC".
Discussing the role of the hype man in the book How to Rap, Royce da 5'9" describes how a hype man can contribute to a live performance: "a lot of my verses be so constant with the flow [that] I'd need somebody to help me." Lateef adds: "You're gonna have to have somebody say something somewhere to give you a breath... usually it's just a matter of getting somebody to hit some line or some word in a line - that's all you really need."
Pioneering hype men 
The quintessential hype man, for many fans and musicians of the era, was Public Enemy's hype man Flavor Flav, whose exuberant approach to the art in the group's recordings and videos made him, arguably, the first household-name hype man, a figure more famous than many MCs. He established many of the conventions of the craft: An outlandish sense of style (epitomized by his wearing of large clocks around his neck), a vocal style that contrasted dramatically with that of the MC (his falsetto was a counterpoint to Chuck D's baritone), and a rhetorical approach comparable to that of a classical Greek chorus.
Notable hype men 
- Proof and Mr. Porter of D12 for Eminem
- Freaky Tah of The Lost Boyz
- Bushwick Bill of The Geto Boys
- Memphis Bleek for Jay-Z
- Spliff Star for Busta Rhymes
- Tony Yayo for 50 Cent
- Joe C. for Kid Rock
- Bob Nastanovich for Pavement
- Dapwell for Das Racist
- Xanadu for Family Force 5
- TreeJay for Mac Miller
- Kap Ten of Down With Webster
- Big Benn Klingon for MF DOOM
- Yo-Landi Vi$$er of Die Antwoord, described as a "hype girl"
- Safaree a.k.a Scaff Beezy for Nicki Minaj 
- 2 Bigg MC (or Too Bigg MC) for MC Hammer
- Bryan "b.LaY" Lay for Deuce
- "The Hilltop - The Role of The 'Hype Man' In Hip-Hop". Thehilltoponline.com. Retrieved 2010-08-12.
- Barrett, Grant, 2006, The Official Dictionary of Unofficial English, McGraw-Hill Professional, p. 182.
- Hess, Mickey, 2007, Icons of Hip Hop: An Encyclopedia of the Movement, Music, and Culture, Greenwood Publishing Group, p. 176.
- Edwards, Paul, 2009, How to Rap: The Art & Science of the Hip-Hop MC, Chicago Review Press, p. 304.
- "Kool Moe Dee". Thafoundation.com. Retrieved 2010-08-12.
- "Record Executives Thought Jay-Z Was No Good » MTV Newsroom". Newsroom.mtv.com. 2009-08-26. Retrieved 2010-08-12.
- Vibe magazine, Jan 2004, Vol. 12, No. 1, published by Vibe Media Group, p. 75.
- Jonathan Cunningham (2007-03-15). "Kane's Domain - Page 1 - Music - Broward/Palm Beach - Broward-Palm Beach New Times". Broward/Palm Beach. Retrieved 2010-08-12.
- Harris, Ashley Rae, 2010, Tupac Shakur: Multi-Platinum Rapper, ABDO Publishing Company, p. 35.