Simon Pegg, all gopherish twee charm, takes a break from genre send-ups to play a romantic-bumbler, English-Everyman Hugh Grant type in Run Fat Boy Run. He's got what it takes, but he's saddled himself with a script (co-written by Pegg and Michael Ian Black) that Adam Sandler wouldn't have pulled out of his bottom drawer. After dumping Thandie Newton at the altar (we're supposed to have sympathy for this guy?), Pegg tries to beat her beau (Hank Azaria) in a London marathon. Director David Schwimmer bloats this slapdash concept into dim, witless overkill. D

