A homosexual male term used in skateboarder. It implies one man giving another male an erection. When the certain male receives an erection, his 'horn' has been thrown up.
Skater- 'Hey mitch did you see that nose kickflip?"
Friend- 'Yea that was pretty hot and wicked'
Skater 2- 'You boys throwing up em horns or are you skating?
Friend- 'Yea that was pretty hot and wicked'
Skater 2- 'You boys throwing up em horns or are you skating?
by Hospis Vet March 20, 2011
Get the Throwing up em hornsmug.