|Ob, Obby||A Summoning obelisk, a Soul Obelisk in Menaphos, the Wilderness Obelisk|
|Occ||An Occult floor in Daemonheim.|
|Off, Get off||Stop attacking|
|One-iteming||Using a single item (usually weapon) to minimise risk when player-killing|
|Ooo||Orb of oculus|
|Ovl(s)||Overload potion. Can also be used as a verb indicating to take a sip of an Overload potion.|
|ob x m||Overload boxing x mil|
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