A boner that lasts for a long period of time for no reason, or if you've taken too much viagra.
Dude yesterday I had a freaking muscle cow during that lecture and I swear everybody noticed.
by JoshTheManWassup March 19, 2011
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from email@example.com. We'll never spam you.×