The older, dumber sibling of the simple drunk dial.
Often made so drunkenly that it doesn't go through, due to the caller's not even using a phone.
Just yelling incoherently into an object that they believe IS a phone.
A baby monitor, a radio, a coconut*, whatever.
* A coconut might actually accidentally work as a phone if the caller's roommate is the Professor from Gilligan's Island.
Or it might work as a bowl to eat dessert out of if the caller's roommate is insensitive enough to have used all the dishes.
(Which could be the same roommate, if the Professor forgot all about dishwashing etiquette on that island.)