I wonder,
what does a catchy slogan make?
Is it humor, maybe? Side-splitting slogan to placate the masses..haha
Or maybe, a jab or satire on social hierarchies, and such..

Do share, that is, if you really have this clear opinion on what a t-shirt slogan should sound like.
Better yet, share your own success at having your ideas printed..

Frankly, i'm not good at design. Well, i'll give it my best but i think my chances lie in slogan-making. Anyways, i've just place an order for a hoody, a red one with the MP(3) design.

Hope the hoody is as good as it looks.