online shape-shifting
When someone constantly changes their chat/profile names to entertain and confuse others.
*person1 is now Barack Obama*
20:07 Barack Obama: I can do some real damage now.

20:07 person2: XD

*person1 is now Jackie Chan*
20:08 Jackie Chan: LOL

*person1 is now Albus Dumbledore*
20:09 Albus Dumbledore: LOLOLOLOLOLOLOLOL

*person2 is now Mick Jagger*
20:09 Mick Jagger: :U

*person1 is now Kesha*
20:11 Kesha: XDDDDDDDDDDDDDDDDD
20:11 Kesha: we're going to rule the world, dude

20:11 Mick Jagger: XD we can be ANYONE at ANYTIME.

20:11 Kesha: >:3

20:12 Mick Jagger: we're like online shape-shifters o___0

(...and thus online shape-shifting was born)