Smack Apparel: $300 per shirt idea

Smack Apparel sells shirts with college sports trash-talking slogans -- some clean and some not-so-clean.  They are open to submitted shirt ideas, and they pay $300 for accepted slogans.  The site's theme can best be summed up by this sentence from their "About Us" page:

We love sports, and the Smack talkin’ that goes along with it!