1 definition by P sissy
A boner that you get when you see two ponies having sex. A boner that is slitely on the down side/that boner aftershock.
A few minutes after watching porn I had a pony boner. My two ponies stared having sex right I front of me and I got a pony boner so I had to get some tighter pants on. I got a pony boner when I sew the pony with his dick and balls hanging down.
by P sissy January 30, 2010