FBI agent Malcolm Turner and his stepson, Trent Pierce, go undercover at an all-girls performing arts school after Trent witnesses a murder. Posing as Big Momma and Charmaine, they must find the murderer before he finds them.
An assessment of the film as part of a dissertational examination of Lawrence's contribution to comedic posterity and to African-American cultural history will surely note that the film was not pre-screened for critics in advance.
Looking back, it's strange to remember that the first two movies were both hits, and that Paul Giamatti and Terrence Howard even saw enough in the premise to sign up for the original. At this point, it's really all just flab.