Sit On It Happy Days T-Shirt Size:Medium and a cowboy hat

and a cowboy hat

Sheldon Cooper can be seen wearing this shirt on the Big Bang Theory Epsiode

Whether Tommy Callahan was cow tipping

The shirt reads "The only Feds I trust" along with the show's logo

and the spaceship that finally carried ET home

Sit On It Happy Days T-Shirt Size:Medium and a cowboy hatThis Happy Days t shirt features an image of The Fonz sitting on his motorcycle, and the shirt includes the phrase that appeared throughout the Happy Days series, Sit On It. For the entire eleven season run of Happy Days, Fonzie was one of the most popular characters on television. Fonzie was the show's breakout character and liked to talk tough with the phrase that appears on this t shirt! For any fan of Arthur Fonzarelli, this Sit On It Happy Days t