Real Men (1987)

It's really stupid, but in a really good way. The basic premise is a tough as nails CIA Agent has to take a man off the streets, one that is a dork, a beta male, and get him to stand in for a dead CIA agent. This we have seen over and over again. What sets it apart, however, is the fact that Jim Belushi also has to boost up John Ritters confidence even as he's beating him up. It's amazingly hysterical. And on top of that you have a healthy dose of stupid humor. It's a can't lose.