Verb: the act of placing one's hand on another's shoulder, foot or ear, with intent to surprise or provoke an involuntary response to stimulus, before the target is aware of your presence.
The process of sticking one's hand, in the shape of a bird's mouth, into a man's ass and proceeding to dig into his ass. If done correctly, the man will be stunned and completely immobile for at least five seconds. Does not work on women.
erratic, unpredictable and threatening - possibly motivated by uncontrolled primeval instincts - rage, hunger, lust or even madness
(You have to make the verb up first to develop the adjective. I started using it as a gerund to describe my new puppy's behaviour to friends. It is marvellously onomatopoeic as nobody seemed to have any trouble understanding it as an assumed existing word.)
The act of copying The Raven by Edgar Allen Poe and posting on someones wall(on facebook,etc) or physically handing it to them but should be signed "Copied and Re-posted by(enter your name here).
Steven:I was ravening on Sarah's wall
Natalie:No way!! I want to raven too!!