nymshift 

To change online identities, such as a handle or login name.

I thought I'd seen the end of Cypher's trolling, but he just nymshifted out of my killfile.

nymshift by Travoltron April 13, 2011

nymshifting

Practice of changing names in order to suit one's purposes (such as avoiding being identified or to adopt an identity). Typically done on-line in such as email adresses.

He's been posting to other lists as well, he's nymshifting all over the place.

nymshifting by PeterP June 26, 2008

nimshifter 

Chuck calls you this when he's otherwise speechless.

I told Chuck his DSL modem couldn't possibly be dialing a number and he got mad and said I was a nimshifter.

nimshifter by Homer Loves Donuts July 26, 2008