A sneak diss is a bitch move. A sneak diss is when someone makes a rather vague post describing a certain individual in a derogatory way or a situation that multiple people know about, but while describing the person they refrain from using the person's name as to not directly make a connection between the post and the individual. This is a way to keep from being confronted by the post
Dissed Person: Wow, Haroldjust sneak dissed me on his Snapchat story.
Other Person: Damn, Harold's such a little bitch. Why wouldn't he just say it to your face?
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."