The t-shirt deal of the day over at RIPT Apparel today is a mash-up of South Park and Portal called “Stinking with Portals” by artist Chuffy.

The shirt went on sale at RIPT today, Monday, October 3, 2011, at midnight CST, and will continue for 24 hours from then, and once it’s over, it will not be sold on the site anymore.

The t-shirt is available in men’s and women’s sizes for $10 each in black. Kids sizes are $15 (Boys, Girls in black); Onesies are $18 (in black). You can also get the design on a Hoodie for $38 (in Men/Unisex sizes in black).

Here’s what the artist had to say about this design:

This design is inspired by the idea: What would happen if Terrance and Phillip from South Park had access to Portals? The answer is obvious. Just be thankful the T-shirt is not scratch and sniff.