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A bum call is caused by accidentally sitting on your mobile phone without realising it. it takes beteween 5 to 30 minutes to hear that your Buttoks have somehow pressed exactly the right combination of buttons to get onto the phonebook setting and call a friend who you've never actually called before.
*Rustle rustle*
*Rustle shift rustle*
"Crap another bum call"
*Fart muffled voice rustle*
"HELLO!... retard"
by Triple J September 24, 2005
20 11
when your butt accidently dials a number
jane: "hello?"
jane:"dude it's a bum call!"
by bum calls April 11, 2009
4 2