The Couch Trip (early Dan Aykroyd at his best) Stripes Early Steve Martin, such as: The Jerk Dirty Rotten Scoundrels (both already mentioned) All of Me The Man with Two Brains
some british funnies/classics: withnail and i how to get a head in advertising both with richard e grant staring.
Commando? with Arnold Schwartzenneger is the worst film that I've ever seen and is unintentionally(?) funny.
"God willing, we'll all met again in Spaceballs II: The Search for More Money." Man, that's a classic.
i concur: Airplane, Spies like us, Space Balls, Naked Gun, any movie by michael moore. also that movie with michael kane, i forgot its name, about those crooks that sway women for money.. it was hilarious. funniest tv series ever: Herman's Head.