Professional ratings
Review scores
Source	Rating
AllMusic
Chicago Tribune
Encyclopedia of Popular Music
Entertainment Weekly	B
MusicHound R&B	5/5
Q
Rolling Stone
The Rolling Stone Album Guide
Spin Alternative Record Guide	9/10
The Village Voice	A

Mama Said Knock You Out is the fourth studio album by American rapper LL Cool J. It was produced mostly by Marley Marl and recorded at his "House of Hits" home studio in Chestnut Ridge and at Chung King House of Metal in New York City. After the disappointing reception of LL Cool's 1989 album Walking with a Panther, Mama Said Knock You Out was released by Def Jam Recordings in 1990 to commercial and critical success.

Mama Said Knock You Out was released on September 14, 1990, by Def Jam Recordings. It was promoted with five singles, four of which became hits: "The Boomin' System," "Around the Way Girl," the title track, and "6 Minutes of Pleasure." The album was certified double platinum in the United States, having shipped two million copies. According to Yahoo! Music's Frank Meyer, Mama Said Knock You Out "seemed to set the world on fire in 1990", helped by its hit title track and LL Cool J's "sweaty performance" on MTV Unplugged. The title song reached number 17 on the Billboard Hot 100 and was certified gold by the RIAA. LL Cool J won Best Rap Solo Performance at the Grammy Awards of 1992.

In The New York Times, Jon Pareles wrote that Mama Said Knock You Out reestablished LL Cool J as "the most articulate of the homeboys", sounding "tougher and funnier" rapping about "crass materialism" and "simple pleasures". In Mark Cooper's review for Q, he wrote, "This 22-year-old veteran has lost neither his eye for everyday detail nor his sheer relish for words."Select magazine's Richard Cook said, "LL's stack of samples add the icing to a cake that is all dark, remorseless rhythm, a lo-fi drum beat shadowed by a crude bass rumble. It could be Jamaican dub they're making here, if it weren't for LL's slipper lip."Mama Said Knock You Out was voted the ninth best record of 1990 in the Pazz & Jop, an annual poll of American critics published by The Village Voice.

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