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1.
A German squeal is a sound performed during a sexual act. In the film Inglourious Basterds, Josef Goebels performs a German squeal while having sex with his interpreter. It is a blood curdling pig like noise.

The goal of a German Squeal is to call one of your friends on the phone while you are doing it.
For an example of a German Squeal, see Josef Goebels, Inglourious Basterds
by David Low January 01, 2010