A Sneaky Dickens attack is when someone gets up from from their seat at a bar or restaurant and leaves their coat temporarily unattended. The attacker quickly draws a penis on a napkin or scrap of paper and puts it in the unsuspecting victims coat pocket for them to find at a later time. Some more advanced attackers may even have penises drawn on many pieces of paper ahead of time so that they can carry out attacks more efficiently and with less risk of being caught since their "ammo" is pre-made.
"When I got home from the bar last night my coat pockets had a bunch of dick drawings in them. Someone gave me a Sneaky Dickens."
"Let's get Chad with a Sneaky Dickens when he goes to the bathroom."
Someone who schemes. One who has a shifty, guilty, and/or mischievous air about them. A sneaky dickens is a crafty trickster. Whether they get away with their stealing/pranking/schemes or not, they are deemed a sneaky dickens for life.
Sarah: Look, Chantal stole Carly's french fries when she wasn't looking!
In nature when the alpha male is mating with the females of his choice, the sneek dick monkeys come up from behind to mate the females when the alpha is not looking.
My supposed homeboy pulled a sneak dick monkey on me and tried to get atmy girl when I was out of town....
someone who without your knowledge or consent, forces a penis upon you with intent to rape and or injure. This is done very stealthily, the equivalent of the ninja buttfuck.
Watch out for Jason Pettengill, last night he sneak dicked his brother, hit him hard with the ninja buttfuck