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 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.