Top Definition; adjective. 1. When you get an erection so intense that it seemingly lasts forever. 2. A boner so hard and furious that it stays that way even after you masturbate.
I was looking at Veronica's cleavage in class all day today and I got the worst foreverection!
I jerked off 3 times last night and my foreverection still didn't go away!
by Fatalize June 11, 2013
the bodily function erection or "boner" randomly occuring and remaining erect for a vast amount of time for no apparent reason
ME: Have you ever got a boner randomly and wont go away?

FRIEND: You got that Foreverection
by DATFEED August 26, 2014

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