Seen as a right of passage in most groups of friends, the Hurricane Katrina (Often referred to as "The HK") is performed the night of birthday parties at midnight, usually starting at age of 20. The sequence of events goes as follows
At midnight, everyone at the party starts chanting "Hurricane Katrina" and begins to Make their way outside. Everyone gathers around the birthday boy/girl. Once everyone is gathered, the birthday boy/girl takes a handle of alcohol of their choice and takes a pull for as long as possible. As soon as the pull is complete, a bucket or a few cups of water are thrown on the birthday boy/girl. Directly after the water, the birthday boy/girl gets an extremely hard slap across the face (The birthday boy/girl gets to decide who slaps them ahead of time). Once the HK is complete, partying resumes with the birthday boy/girl's new found glory.
Nick: I'm really nervous about the HK man.
Ned: Don't be such a pussy. And make sure not to take a pussy pull. 5 seconds minimum.
Nick: I won't, my rep is on the line here
Erin: Did you see Nick's Hurricane Katrina?
Sam: Yeah, it was nuts. He got slapped so hard
Erin: For real, he's definitely going to be feeling that tomorrow.
Sam: He certainly got huge respect for him now