Phrase used to describe the act of writing useless software, and not excellent code as what some may believe, after partaking in the consumption of 'several' cold beverages.
'Stella' coming from Stella Artois, a lager brewed in Belgium and after consuming a few can lead to an altered state of consciousness, and 'Code' as in what Software Developers create.
The act of writing "Stella Code" usually occurs on a Friday afternoon. I.e. after coming back from a "liquid lunch".
User: This software doesn't work anymore?!
Support: That's because it was hacked by John on Friday who is known for his Stella Code.