Step Brothers isn’t as inspired as Will Ferrell and John C. Reilly’s previous collaboration with director Adam McKay, Talladega Nights: The Ballad of Ricky Bobby, yet it has its own deranged sense of glee. As grown men whose lives of sponging come to an end when their respective single parents meet and marry, Ferrell and Reilly are both playing morons, and the degree to which they try to out-stupid each other is both frightening and hilarious.