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2.
A telephone call to a stranger...business, or even a friend. The point is to cause confusion and anger, or just to let out some pent up energy or boredom. Usually people will get angry and hang up when you start annoying them, if you keep calling them back to back, that will get some laughs :D a common response is "Who is this?!?" and "You've got the wroung number!"
many accounts on YouTube have celebrity soundboard prank call to random people.
a sample from a Prank Call video on YT titled "Arnold Schwarzenegger calls a drunk (2nd time)"

Arnold: "Howdy stranger"
Drunk: "F**** you stranger!"
Arnold: "Howdy stranger"
Drunk: "F**** you stranger!"
Arnold: "Howdy stranger"
Drunk: "F**** you stranger!"
Arnold: "Howdy stranger"
Drunk: "F**** you, F**** you, F**** you stranger!!!!!!"
by Llamalover02 June 16, 2009
 
1.
also known as "crank call"
A call you make to a stranger in which you say random things.
Mrs.Funk: Hello?
Me: Are you funk-ay?
Mrs.Funk: What?
Me: Are you funkay?
Mrs.Funk: What?
. .. . . . . . . . . *dead silence*
by J. August 28, 2004
 
3.
the reason i unhook my phone every night, fuckers
i hate prank calls, i write down the number and tell the police, cause im sick to death of them
by EEwisewolf April 27, 2008