Misprint 

When you go up to someone tanning on the beach, and without them noticing you (hopefully they're sleeping or something), you write an inappropriate word or phrase on their stomach or back with 70 SPF (or higher if possible) sunscreen.

"The chick got so pissed when I misprinted her yesterday!"

Misprint by JrooJrooBonz September 27, 2008

Gross misprint 

To deficate promptly and with explosive liquid petrusion from the anal crevice.

Explosive diarrhea.

“Honey I did it again, I had a gross misprint.”

Gross misprint by Explosive diarrhea November 16, 2017