Obama's Armored Limo BOTTOMS OUT in Ireland

5/23/2011 10:45 AM PDT BY TMZ STAFF
President Obama's Secret Service probably needs a whole new set of underwear -- after the Prez's armored limo CRASHED into a nasty speed bump in Dublin today ... and was instantly immobilized.

Talk about luck of the Irish.

UPDATE: A rep for the Secret Service claims Obama was NOT in the vehicle that bottomed out due to a "slight miscalculation" -- telling us, it was a spare limousine carrying staff and support personnel only. There were no injuries.