The abbreivation for 'over and out'. Used specifically in online chats. Used to indicate to the other person that its the end of your chat and will not respond and you are busy even if still online.Avoids in ending chats which may extend due to undesirable pings when one has to go away and other person keeps saying goodbyes,takecare,wishes and you have to reply just not tobe rude .A soft mannered way of ending chat.
x:you take care talk to u later
x :o n o