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The phenomenon that takes place when a sexually aroused male experiences a sudden or gradual rush of blood to the penis causing it to stand stiff and harden, often occuring unexpectedly in a public setting.
I always pop a boner every time I see your mom bend over

I popped a boner in Miss Goodbody's math class just before she asked me to solve a problem on the board
by streetsouljah November 02, 2009
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