What is Sly Sign?
1.
When you put your middle finger up to somebody behind an opaque object (predominantly a door), releasing anger but not getting into trouble. Usually used by young teens, aimed at parents.
"My mom was being so annoying... so i sly signed her through the door when i left the room."
"No way dude!"
See
Random Words:
1.
the word used in the demented cartoon movie that causes a nuclear explosion
someone's just going to come up and say zeekyboogydoog..
1.
When one door of a pair of double doors is locked closed and the other is open this is the act of repeatedly walking into the locked one..
