One thing to remember with bulking... here in America, a lot of people are obese. When we bulk up to 15% or even 20%, most people aren't even going to notice. You will still be thinner than a huge chunk of the population. Not only that, but while you are still clothed, as long as you are wearing appropriately sized clothing, it will be very hard to tell that you no longer have a six pack. Obviously this all varies slightly with the way you store fat. For instance, I store it in my belly and lower back a lot and my arms don't ever get much fatter, so I always have vascularity in my arms and thus people always think I'm shredded even though I'm not. If you store fat all over, then this might not be the case for you. But it still stands that even if your arms lose some definition, you will still look like you have less bodyfat than the average american. Not only that, but your fat is only temporary. Anyone who says anything about you being a chubber will have to eat their words some months later when you come out looking ten times more awesome than you did before your bulk started.