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The act of inserting icecubes in ones partners anus then having anal sex. The icecubes are for pleasuring both partners. The ice is supposed to numb the anus for the receiver making it more comfortable and less painful.

I first heard it on the Bubba The Love Sponge Show.
Marsha: Greg told me he wanted anal sex again, and I told him no because it hurt the last time.

Jan: Well what did do?

Marsha: He suggested putting icecubes in my..... poop-shoot! He called it a Syberian Doorknocker!

Jan: Well did ya'll do it?

Marsha: Fuck yeah. I had an assgasm and I was numb all inside.
by WTXFTE March 19, 2010
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