A Sam Lamb
Creepy, greasy fat dude who flaunts his child pornography collection.
Your working at your cellphone store and a customer comes in and asks to help him with the moving of pictures on his phone to an SD card. The customer hints to you that he has questionable photos. Thankfully you see nothing but the very presence of this dude gives you the creeps. You turn around and tell the new hire that you just experienced a Sam Lamb.