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When the decibel level on a person's voice is raised to talk in an outdoor environment.
Sorry I can't hear you with all this traffic going by, use your outside voice.
by systemsengineer June 08, 2009
9 1
When you say something that you were thinking without realizing it, usually something that the other person should not be hearing.
Before I could stop my outside voice from kicking in, I told Alison that I'd like to run my tongue threw her massive cleavage.
by grisgris1 February 24, 2011
1 6