The Big Lebowski - I think the focus on sport (bowling), drugs, bachelor life, comedic lads banter (John Goodman the converted Jew, John Turturo the Bowler), comedic lads fighting (nihilists), dream sequences of girls legs and so forth make this a lads movie. One of my favourites of all time.
Once Upon a Time in the West - a classic western with guns and tough loners. They help a woman struggling against an evil enemy as well. Good one liners before death and destruction is neted out as well. The exchange about the horses at the begninning is fantastic.
The Great Escape - Men bonding and fighting together through success and tragedy. War, heroism and the absence of women make this a man's film.
Starship Troopers - Classic parody on the war fim genre and on propaganda generally. Pleanty gore, mass destruction, technology and sci fi to entertain the 12 year old boy and plenty of eye-candy and irony to entertain the fourteen year-old upwards.
Terminator I - Excellent film of one man againt the odds. The woman is a little bit helpless to begin with and the baddie is bad to the bone. Sci-fi, time travel, guns a go go, murder of the innocents and cool killer.
Highlander - The film is basically based around a series of one on one battles between the male protagonists. There is a bad baddie, a good goodie and a few helpless women. Throw in the escapism of immortality and you have a film for the lads.
Portal