To make a reference or pun about the Undead things From the Legend of Zelda series in an otherwise unrelated conversation often used on Zeldapedia's IRC channel when the user Redeadhunter is involved, mostly because he inspired them.
User: I was out hunting with some Friends and-
Other User: Hunting ReDeads?
User:...Ummm, no. Stop with the Redeadism BS, my interest is not my ****ing life.
This psychotic freak jumped on my back and started chewing on my head like some sort of ReDead or something!!!