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21.
Use of the word "ping" or #ping is commonly used by friends on twitter or facebook to mean agree instead of a "like" or to favorite a tweet. It has been said that it is derived from the sound that an electronic device makes when a notification is sent of an email, facebook message or a mention on twitter.
W: Why oh why does this network NEVER promote their TV shows, do they want it to fail?

E: PING

W: The world has returned to its original orbit, all is now right in the world

E: #Ping
by @ess270 May 20, 2012
 
1.
The time it takes for a network packet to leave your computer, go to another one, and return. Lower = better. Can also be a source of gloating in network games. Typically measured in milliseconds.
"Dude, your ping is 300. Get the hell off my server before I boot you!"

"Ha ha, lowest ping!"
by thlayli January 13, 2003
 
2.
a virtual "poke" (email, instant message, etc.) usually sent for reminder purposes.
feel free to ping me if i haven't gotten back to you by friday morning!
by dont use my name ever again September 10, 2005
 
3.
"Packet Inter-Networking Groper." PING Can be used as a command in MS-DOS. Early computer programmers used this acronym because of it's similarities to a SONAR ping. A computer ping will send a packet of data from one computer to another to measure the time it takes for information to be sent and received. Pinging a computer can also help diagnose problems within networked computer systems.
Ping www.urbandictionary.com
by Rubber_Mullet October 16, 2003
 
4.
The sound you hear when someone sets off your gaydar.
Kristen Stewart pings louder than a U-boat in enemy territory.
by TheFrozenPirate July 15, 2010
 
5.
To send a short message, expecting a yes/no response. Originally from submarines, where a ping sound was emitted to listen for echoes from other vessels.
Since you're so busy this week, I'll ping you again next week about meeting for lunch.
by norstadt July 22, 2006
 
7.
To pop up on someone's gaydar
Kristen Stewart really pings for me. Look at her body language!
by mellowyellow77 October 10, 2010