A girl who is impenetrable in in every way imaginable.
Hey that girl is hot!
Yea too bad she has a Steel Box.
by eskimosurfer June 04, 2010
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Some where people would need to go if they are about to have and explosive sexual reaction.
"Quick! get the steel box! I just saw two lesbiens getting off!
by MrXYandZ May 18, 2008
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