To become figuratively erect during a moment of nationalistic pride.
I got a huge freedom boner when the NFL mandated the players stand for the national anthem.
by justzach June 6, 2018
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1. The erection you get when you free your penis from your tight underwear.
Wife: how come you always have an erection when you get home from working at the construction site? Are you gay?

Husband: Don't worry baby, it's just a freedom boner
by antillianboy August 4, 2010
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when you get an erection from doing something epic or doing something that requires bad-mother-fucker-ness
zach and andrew were talking about basic training and after basic zach said he had a freedom boner
by mothafucka-jones March 21, 2012
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