A passedout drunk gets his/her chest and stromach area covered with a sharpie or other permanant marker.
"Is that a black under-shirt?"
"No, it's a Sharpie Shirt."
"You're fired."
Someone who always makes people sad. Your first reaction to everything they say is probably, "oh! are you ok?" Then, that's the next reaction someone will have to whatever you say.
hey have you talked to Skylar lately?
No dude, I can't she puts me in such a bad mood. She's a total blue sharpie.
The act of using a sharpie for vaginal or anal pleasure
Damn, Dominic is way too open about sharpie-ing
A reference to a popular anecdote/inside joke in the homestuck fandom, where a cosplayer took a bath in sharpie ink and alcohol to dye their skin grey.
Vriska cosplayer: ‘How are we going to get our skin grey?’
Terezi cosplayer: ‘What about a sharpie bath?’
Laughter ensues.