In the Russian part of the internet, "qq" is an acronym for "coo-coo", which sometimes stands for "hi" in Russian.
Sometimes can also be just a single "q".
she is the definition of the warm side of your pillow, the broken charger, the not long enough cable, the mouldy gum under your table, the stench when you walk into a cheese shop. she will lick ur dogs for money because shes kind of broke and is in desperation for cheaper things. if you want her to go away, just pull out this definition!
A "QQ thread" in the discussion forums of MMORPGs like World of Warcraft, is where a user starts a discussion thread which is basically a complaint, whine or whinge about something in the game they are not happy with.
QQ itself is meant to symbolise someone crying; the Qs looking like eyes with tears streaming from them.
"This isn't a QQ thread, but please nerf class X as they beat me in combat and thus must be overpowered and imbalanced!"