by funsize1481 May 30, 2015

When you leave a book open for a while (paper-cover), and when you go to close the book, the cover pops back up.
Tim: Damn my text book has a book boner, I am gonna have to flip it on its other side so it will go away.
by WYALS September 11, 2016

A boner that is achieved by thinking of forbidden thoughts. The owner, of said boner, must always make his best efforts to not let his friends know the root of his erection
“That fella Jack’s got a boner”
“I swear I’m not thinking about my sister”
“Aha, Jack’s got a Prague Boner”
“I swear I’m not thinking about my sister”
“Aha, Jack’s got a Prague Boner”
by TheTomBrady69 April 22, 2020

by Pisanty September 11, 2010

Kernels of undigested corn which can be found stuck to your penis immediately following withdrawal from unprotected anal sex. Preferably, one would find boner corn while in the woods, after a barbecue, on hot August night in South Carolina.
by Iamascientist86 January 23, 2015

A pinny-like garment that restricts the protrusion of an erect phallus from interfering with other peoples day to day business.
by DJ SH TA January 15, 2015

by Le Carlton June 8, 2018
