Top Definition
When a girl is so hot that you spend most of your sexual thoughts focused on her, leading to a massive erection that seems to almost never go away, she has given you the eternal boner.
Guy 1: "Dude, I can't stop thinking about Anna. She's so hot, bro."
Guy 2: "That's because she gives you the eternal boner, man."
Guy 1: "Word."
by Bear Master November 02, 2013

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