A masturbation technique where a male masturbator rolls back onto his shoulders, with his body in the air over his face for the purposes of either giving himself a cum facial or eating his own load. Since the masturbator is essentially upside down, he takes on the appearance of a sleeping bat.
"I'm not flexible enough to suck myself off, so in order to cum in my own mouth, I have to resort to bat jacking"
by Char H January 08, 2006
Can you define these popular missing words?