Keep Calm and Stay Rational Funny Pi T-Shirt

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Keep Calm and Stay Rational Irrational Funny Math Geek T-Shirt

This bright and bold graphic in red, sea green, and white, reads "Keep Calm and Stay Rational." All caps are used in mixed fonts and the words are accompanied by the ultimate symbol for the complete opposite of rational: the Greek letter Pi. Other graphic elements include exclamation points and Art Deco style borders.

The lowercase Greek letter Pi is used in mathematics and geometry as a symbol for the irrational constant that begins 3.14159... This irrational number is used to calculate measurements in a circle.

Get this fun, silly, and downright irrational apparel design for the math geek or science lover in your life! It's great for math teachers, mathematics students, geometry lovers, and more!

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Keep Calm I'm Part Ninja Black T-Shirt

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Are you a fully trained warrior ninja and you want your friends to calm down? Then check out this funny graphic tee design with the text Keep Calm I'm Part Ninja. This is based on the classic British Keep Calm and Carry On posters. This spoof version has...

No Internet! I Can't Keep Calm! Funny T-Shirt

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We love this funny variation on the Keep Calm meme. In this case, keeping calm is impossible -- and with good reason. No internet! How will you survive? How will lingering random questions be instantly answered? How will you know what is going on with your friends? When will you be able to update your network on your latest meal choice?

Fun for Halloween: Bloody Scary -- Keep Calm?!?

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It's hard to keep calm in a crisis. How about a bloody crisis? This variation of the Keep Calm meme can't even get its entire message out before turning into a bloody mess. The text reads Keep Calm but ends in a big realistic-style red blood splatter.

Don't Tell Me To Keep Calm Travel Mug

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Sometimes keeping calm isn't the answer. And certainly telling someone else to remain calm could be a dangerous move. This funny spoof uses the traditional crown but turns the slogan decidedly negative. This design uses bold red text that pops against the metal background of the mug. Shown here...