What do these mean

So you can sell banned accounts?

You can try it, but depending where are you going to sell it, you will get banned for trying to scamm before you can sell it, at least if the buyer is a smart person or is using OMM.

@Problematicc
There are exceptions to that rule, information sites that aren't related to game hacking are fine i'm pretty sure.

QQ = Cry (or complain)
A7A = Egy version of accusing some one of ha.cking. So they call a hack A7A i'm pretty sure.

Bump = Its just to bring your post to the top so more people see it (Bump meaning Bring Up My Post), please note you can only bump every 24 hours.
Flag/Flagged = Crossfire related, it means that the account is unrecoverable. Flagged accounts are worth more, as it's harder to scam.