the act of spending the night after sex or a sexual act and then getting up and leaving without waking the other person up.
"after drinking 17 shots and leaving with a '2', Balint found it in his best interest to leave via a dear john in the morning"
A goodbye letter from your girl. Congratulations, you're dumped. For playas: No prob. Jus move to the one next in line, nah mean? For the romantics: Try to avoid all sharp and dangerous objects & substances if possible.
What's worse? Being left and never getting a goodbye.