It is commonly used in castle war worlds or clans as they are either in the 'zammy' team or are in 'Saradomin' - another main god and are talking about people who are in 'zammy' e.g.1 see below
When selling or buying weapons or armour which are either to do with 'Zamorak' or are blessed by 'Zamorak'. Players usually shorten 'Zamorak' to 'Zammy' ... see below e.g.2
Also known as 'zamy'
*on a clan*
Player1:i am so for saradomin those zammys are well noobs
Player2:right guys, zammy is owning underground need people down there
*in a bank*
player3:buying zammy red dhide body