Definition from Wiktionary, the free dictionary
English citations of QQ
verb: (unclear sense) 
- 8/17/1995, "R. Todd Easbey" (username), "California Fan QQing for TICKETS!", alt.sports.football.pro.denver-broncos
verb: (apparently different but equally unclear sense) 
- 12/15/1999, "JOJO" (username), "Re: Who is Eileen Edwards??", alt.wisdom:
- Yep QQing for the man in the white Jacket
verb: (apparently another different but equally unclear sense) 
- 12/20/2003, "~Sage" (username), Re: Best wishes, alt.support.headaches.migraine:
- […] feel better girl, have a good trip, Happy Holidays, and looking forward to QQing you next year!
verb: crying 
- 2/21/2008, "lcpltom" (username), Re: BG suggestions for improvement, alt.games.warcraft:
- For the other, the QQing of PvP twinks would overwhelm the servers.
verb: (another unclear sense) 
- 9/24/2008, "SpaceGirl" (username), Re: CS4, alt.graphics.photoshop:
- Painter X has this feature, and it's something I've been QQing over for years in PS.