what is "q bet" in spreadbetting?

Answer 1

It's about the Q-ratio since it's used to determine over or over value of a stock. You use that to figure out which end of the spread you want to play.
http://www.investopedia.com/terms/q/qratio.asp

Answer 2

Quality. When they first started producing cotton swabs, they wanted to say they were 'quality' better than you could get by twisting your own cotton onto a toothpick ... and that is how the name 'Q-tips' got started. Others are just 'cotton swabs' and the Q-tip name is a registered trademark by the Johnson&Johnson company ...