Top Definition
As seen in Futurama: The Beast With A Billon Backs, it is by far the rudest way to hang up a phone. One does this by placing the phone between the cheeks of the buttocks and slamming it back into the receiver. This works best when both parties are using a video phone.
"Issak was being such a dick last night that I crack slammed the phone on his ass!"

"Dude, he must have really been a dick to deserve that."
by C.R. Strenth October 20, 2008

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Using one's buttocks to hang up the phone in the rudest possible manner
"How did you get this number? Hermes, hang up on him in the rudest possible manner!"
"Yes sir!"
*drops pants and picks up the receiver with his butt*
"No! Not the crackslam!"
*SLAM*
by Nurse Zoidberg July 06, 2008

The Urban Dictionary Mug

Lotsa space for your liquids.

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Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt