Rat Fink, by Big Daddy - Ed Roth. I don't think there was a boy in the 1960's who didn't have at least one rat fink shirt, and sticker in his school locker. This image was everywhere. Roth must have had made millions on the royalty rights.
Rat Fink font box set from House Industries (includes t-shirt) | Pricing starting at $160 for 1-10 devices