December 04, 2020, 11:03 AM
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Señor Speedy
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Fecha de Ingreso: Aug 2007
Ubicación: USA
Mensajes: 11,329
Primera Lengua: American English
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Cita:
Escrito originalmente por poli
Then, I assume, it means the metaphoric bullet proof, as in bullet proof alibi or scheme.
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I don't think so, poli.
The dictionary meaning is a 'litmus test' or an 'acid test.' The phrase is used to describe the degree of such a test.
Here are some examples.
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