QC stands for "quality control" when referring to the description of someone's appearance. If someone is referred to as being QC they average a rating of 7 and above however anything below QC ranges from being average to very unattractive (6-1). To say you're going to move QC implies that you will only make advances to someone who's attractiveness equates to a 7 or above. On the other hand moving non-QC suggest you have low standards as you seem to entertain/make advances to people who are unattractive.
Topz is a scum he always moves non-QC tings