A birthday tradition performed on the birthday boy. A group of friends will carry the victim before spreading his legs open and ram his balls against a stationary object, eg; pole or tree. You can shout, "HAPPY FATHER'S DAY!" while ramming the victim.
Victim: Guys! It is my birthday today! Do you all have any presents for me?
Friends: Yeah Sure! We have a present called aluma! It contains a nut cracker.
*Immediately carries the victim and rams his nuts against a pole*