A combination of decieve and devious, it is the "dece" of decieve and "vious" of devious. It is the act of fooling someone and deviously planning something ill natured.
"Don't listen to a word that broad says, she's mad decievious"
A trick people use on Myspace where thier default makes them look totally hot and when you lurk the rest of their pictures, turns out they're ugly as fuck.
Jessica: "Wow, look at this guy's default! He looks so fine!"
*checks out the rest of his pictures*
Ashley: "Oh wait...never mind...he just got lucky with that default. He's actually fugly as hell!"
Jessica: "Can't believe we fell for the old myspace deceiving default trick AGAIN!"
a friendship terminating action. a premeditated plan of something awful towards another close to you, with evil intention. a practical joke gone too far.
after being made fun of for being a dog lover, i thought sneaking my best friends dead dog into his bed would teach him a lesson, but my decieviouse actions led my best friend to suicide.
When you lie, and make your love partener agree to take a shit. Little does he/she know while they are taking the shit which is on a toilet, you push down on them hard so they get wedged in the toilet seat. You proceed to slap them wiv your penis, or dildo, until both cheeks are sevearly bruised.
"Hello hunny, i fancy partaking in a weird sexual fantasy, will you go take a shit we can use later?".....