What is Jimmy Smitts?
1. When someone gets way too drunk and/or gets drunk enough that they feel that re-enacting the character played by Jimmy Smitts in the "Tommyknockers" by walking drunk out of a 2nd story window is a good idea. This means they are drunk enough to do anything up to or equaling the level of drunken jackassery it takes to walk out of a 2nd story window.
2. A way of explaining that you are getting drunk on the down-low.
1. "Yeah, I pretty much turned into Jimmy Smitts last night, called my ex up, and told her to suck a cheeta's dick." or "I was thinking about choking the bitch, but I figured I'd turn into Jimmy Smitts instead."
2. "My Dad just got home, but I assure you I'm Jimmy Smitts."