Adam Sandler still shows up for a movie looking as if he just rolled out of his trailer. Let other actors fuss over their wardrobe or worry about whether they've gained a few pounds: Sandler is Sandler, the people's noble-slob comedian! Mr. Deeds is one of those Sandler opuses in which he plays a big-hearted, happily dysfunctional ''normal'' guy. An idiot variation on Frank Capra's ''Mr. Deeds Goes to Town,'' it's a tossed-together exercise that feels sort of like the dumbest corporate comedy of 1987. Every so often, the star lets out his id by punching someone into the ground, ''Happy Gilmore''-style. All in all, though, this is Sandler running on empty, repeating what he's already done far too often.