Overview
Mama's Boy is a 2007 American comedy-drama film starring Diane Keaton and Jon Heder, and features music by Mark Mothersbaugh. The film was distributed by Warner Bros. for a limited release to certain regions of the United States. Mama's Boy was directed by Tim Hamilton.
Plot
Eccentric Jeffrey Mannus is a 29-year-old book store clerk who still lives with his mother Jan. His father died when he was young, so he has clung to her tightly. He sees no reason to alter this arrangement, but his perfect world is upended when Jan meets Mert Rosenbloom.
Mert is a motivational speaker who successfully woos Jan after she attends his talk on the power of positivity. He moves in on what Jeffrey perceives as his territory, something he will not tolerate. While at a coffee shop, Jeffrey finds a friend in one of the workers, aspiring singer-songwriter Nora Flannagan. They share a cynical, negative perception of the world.
Jeffrey approaches a man working in a computer shop to dig up dirt on Mert. He pays him half the price he asked to do it so, when Mert comes into the shop to buy bribes to win Jeffrey over, the guy spills the beans. Mert changes his tactics, declaring a kind of war against Jeffrey.
From Wikipedia (CC BY-SA 4.0).