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1. offline lurker
Someone who uses MSN Messenger but always has their status "appear offline" for fear of the people who will talk to them if they change their status to "online". The extent of their conversations reach about 3 or 4 people. These select few get annoyed because they never know if the Lurker is there or not. Messages often fail to deliver to the offline recipiant.
Blocking is better than offline lurking. The feature wasn't invented for nothing.

Lurker: Hi
Me: Hi
The following message could not be delivered to all recipients: Hi
Me: COME ONLINE, YOU OFFLINE LURKER!!!
The following message could not be delivered to all recipients: COME ONLINE, YOU OFFLINE LURKER!!!
2. Ninja Mode
When you're on Live Messenger and you tell people you're signing off then you change your status to "Appear Offline"...like so people think you have signed off but you're actually lurking in the msn shadows, waiting to pounce when someone cooler signs in.
Rach: "Here how can you be talkin it says ur offline"
Gill: "It's cool im on ninja mode so nobody else annoys me."
3. Oboing
OBO - Offline But Online.
To be online, while you appear offline on any IM like gtalk or yahoo.
Let me go oboing to see if my boss is online.
4. Offline camo
When a person is on "appear offline" but is still talking to people on a chat program, they are using offline camo
I didn't know she was online because she was using offline camo
5. MSN Ninja
The adjective used to describe someome who signs in on MSN, realizes that their ex Girlfriend/someone else they don't want to talk to is online. Thinking "Oh, crap!" They appear offline, and talk to people they do want to, without being spotted.
OLLIE: Hey man, what you up to?
SAM: Not much... Hey I thought you were offline?
OLLIE: Nah mate, Lauren is on, I'm just pretending to be offline so she doesn't get up me.
SAM: Oh, I see, going MSN ninja. Good idea.
6. Facebook Phantom
A person who uses facebook and uses the "go offline" function. You can see them writing on other users walls, taking quizzes, changing their status etc. But when you want to chat with them, they appear to be offline.
Guy 1: "Hey, the other day i was on facebook and i saw you writing on peoples walls, but it said you were offline. Thanks for being a facebook phantom, i really needed to talk to somebody about my mother...she died..."

Guy 2:" Oh yeah, right when you got on i clicked "go offline". you always want to talk to be about the stupidest things."

Guy 1: ...
7. up periscope
#when using ~Facebook, you always appear offline but occaionally open the chat window to seee who is online before disappearing offline again.
Karen up periscoped to see if clair was on then downed periscope and went back to cruising pepoles profiles
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