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1.
Male slang for having previously-taken pictures of one's penis stored in one's phone, in case a female should ask for "a dick pic ;-)" via text at an inopportune time.
1. "Dudebro, she asked for a dick pic when I was eating with my mom last night. Good thing I had some dick on deck to send her."

2. "Man, do you think Anthony Weiner REALLY has enough free time to take dick pics whenever he's asked? Hell nah, I'd bet my house he's got dick on deck."
by J-coke da killa July 24, 2013