For once, Wiki gets it right:
A blowout is the uncontrolled release of crude oil and/or natural gas from an oil well or gas well after pressure control systems have failed.
Prior to the advent of pressure control equipment in the 1920s, the uncontrolled release of oil and gas from a well while drilling was common and was known as an oil gusher, gusher or wild well.
Now I’m curious—how many ‘blowouts’ were there during President Bush’s 8 years in office? Clinton’s?