Calling a personal snow day, despite clear weather and no snow on the ground, on account of being lazy. Often used in college after a night of drinking, one declares a snow day followed by skipping all classes/meetings to play video games. Snow days may even be called for summer classes. Originating from Western Illinois University, Washington Hall 7.
It's another snow day, I'm not doing a damn thing all day.
Nah, I didn't go to class, I called it a snow day.