This idiom is used when a male gets a boner from something sexy and his heterosexual friend gets a boner as well. This is because the second guy reacts with a boner because upon seeing the first guy's boner he thinks to himself, "man, he's got a boner, there must be something hot around!" It is often awkward, especially among junior high and high school kids.
by teotlxixtli April 27, 2011
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