Also found in: Acronyms.
1. Deceased. My poor old dad has been toes up for five years today, but I still miss him like crazy! When I'm toes up, I don't want my funeral to be a somber occasion—I want people to smile and remember the good times we all had together!
2. Completely non-functioning, non-operational, incapacitated, or destroyed. Well, my computer turned toes up last night. I don't know how I'll be able to finish my essay on time now! I'm just writing this e-mail to let you know that your website has been toes up for the last 12 hours or so. It looks like after nearly 80 years of struggling to stay open, the family business is finally going toes up.