Know-How Exchange : Taglines/Names

Hello, I own a t-shirt screenprinting business named Riverstone Screenprinting (pretty lame huh....see why I need help). I want to start a niche clothing / jersey line to supply area athletic teams (primarily mens softball) with team jerseys and apparel. This will be a web based project so I need the domain name to be available in addition to the business name. The target demographic is athletes (weekend warrior types) in the 20 - 30 age range. I absolutely love the Under Armour name and marketing techniques. Thinking of the perfect name is paramount to this business being successful and I'm really struggling. It doesn't really even have to be a "real name". One of the most successful business names in this niche is "Boombah". HELP....I've been stalling and stalling on starting this business until I find the right name.