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This is a scat-related sex fetish act.

It involves freezing a length of feces, and using it as a dildo on a female partner (or male in gay instances)

The act must be completed quickly before the feces defrosts
guy: hey baby, wanna get austrian pipelined?
girl: Yeah, but be quick!

Girl: I can't wait to use that Austrian Pipeline we made yesterday!
by Dr SexEd February 08, 2011