1). Utilized by nerds and nerdlings all over the world, mainly used in preparation for comic book and gaming conventions. 2). The act of preparing for life's uncertainties through the meticulous act of checking one's person for the most important articles (e.g: cell phone, keys, etc.)
3). (fig) The act of preparing for life's uncertainties through taking a personal inventory of what matters most in life before venturing blindly into an unknown situation
Nerd 1: You ever been to a convention before?
Nerd 2: No.
Nerd 1: Make sure you check your fucking pockets, dude. These people will rob you blind!
Person 1: I heard you caught herpes from that guy you picked up at the bar last week.
Person 2: If only I had checked my fucking pockets, it wouldn't have happened.