It's from the movie Risky Business where Joel (Tom Cruise) and his friends are in a high-speed chase. Joel's friend in the backseat says, "I've got a trig mid-term tomorrow, and tonight I'm being chased by Guido the pimp."
I've had three orange tabby cats, and all three were Guido's, so I guess my present cat is Guido the Third (Guido III).
