Definition from Wiktionary, the free dictionary
English citations of highbie
Noun: "(gaming) a high-level character in an MMORPG" [ edit ]
1996 1997 1998 1999
2001 2004 2006 2011
ME « 15th c.
1996 November 16, Chuck Foster, “Weekly rec.arts.drwho stats (16 Nov)” ,  : rec.arts.drwho, Usenet
He's back! And its about SAD! Suddenly everything changes as the highbies of last week disappear rapidly downward. In fact, last week's number one does not feature at all!
1997 June 23, Jay Moretz, “Re: Retromud” ,  : rec.games.mud.lp, Usenet
We all believe, however, that in order to enjoy the MUD, new players should advance on their own, and not just dragged around behind a highbie and handed Exp.
1998 June 9, Arlie Stephens, “Re: Botting and Autoplaying” ,  : rec.games.mud.admin, Usenet
highbie and since everyone knows what they did, the players give them all the respect *they* believe a 'botter deserves. (I.e. they aren't a "real" highbie in the eyes of their peers.)
1998 October 6, Osku Salerma, “Two weapon combat, gamma 8 was FUN, and more” ,  : rec.games.roguelike.adom, Usenet
Lets calculate how this would affect highbies.
1998 December 12, Gourry31 [username], “Re: Ick” ,  : dejanews.comm.retromud, Usenet
highbie but not every caster is a tele and sometimes you are just stuck without one (happens to everyone..including highbies :))
1999 March 31, EATpikachu [username], “Re: Pokémon Simming Game” ,  : alt.games.nintendo.pokemon, Usenet
All the " highbies" (AOL phrase, sorry) would gang up on all the people they didn't know-- the newbies.
1999 July 6, trescami [username], “Re: http://retromud.org - Critical Mass?” ,  : alt.mud, Usenet
Highbies may be in the middle of something and thus not able to help even though they are newbie helpers.
2001 May 1, Richard Burge, “Re: Money making with tailoring” ,  : alt.games.everquest, Usenet
Backpacks go to high levels who want to replace their crappy 6 and 8 slot containers - if you are too low level to auction where they hunt, try somewhere like EC tunnel where many highbies stop by to off load their wares.
2001 September 5, Silverlock [username], “Re: Why trivial loot code sucks mister Harmon.” ,  : alt.games.everquest, Usenet
A lowbie always has access to highbie stuff simply by leveling up, but highbies are purposely restricted from this content.
2004 November 3, Marcel Beaudoin, “Re: For me, City of Heroes is more fun.” ,  : alt.games.everquest, Usenet
I can't count the number of times that I have been in a fight, and some anonymous highbie runs by, throws a bubble/heal/buff on the group and keeps on going.
2006 January 24, Lehl [username], “Re: Have your guilds 'branched out'?” ,  : alt.games.warcraft, Usenet
Apparently, their lowbies are now in one of the guilds, and the highbies all migrated to the other guild.
2011 — Lauren McLaughlin, Scored, Random House Children's Books (2011), ISBN 9780375968204, page 3:
The score was "the great equalizer," and Imani knew that as a "
highbie" she was poised to benefit at the highest level.