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1.
An erection that lasts for a substantially long time, in other words a boner that will not go down. Can also be referred to a man's penis that is both large and can go for a long time.
Last week I woke up and had a boner that simply would not go down, my girlfriend dubbed it the "Hour Tower" after she used it.
by #1stunna' November 28, 2007
 
2.
A peak that is reached for a limited time only
Well, here was this hourtower, but any fool could see that it would not last.
by Hercolena Oliver April 20, 2009