The true badass doesn't need to flaunt his chops, but he might want to wear a subtle suggestion, lest some wannabe misinterpret his contemplative enjoyment of a soy latte. For a restrained statement of your inner dangerousness, try 426 Brand.
Created by a Chicago native inspired by muscle cars, motorcycles, and rocker subculture, 426 offers "superior comfort that's comfortably evil" (soft as a Beelzebub's bottom). They've just bolstered their t-shirt line with four new ultra soft & distressed numbers: the crossed Las Pistolas, Red Spade (w/ black Chicago star), the malevolent party-god'd Hot Rod Tiki, and The Flying Knights, a tweaked homage to the Shriners (fez, sick children not included). For a bit more nut, check out their sub-brand Chicago Muscle, under which they've dropped two ltd-edition button-downs: Buc Danger, a black, long-sleeve cowboy shirt rocking two hand-stitched, fire-red she-devils and a bat-wings-&-steer-skull logo on back, and another, short-sleeved Hot Rod Tiki rocking the aforementioned tiki god (whose blood becomes Mai Tai through the process of transubnebriation)
In about a month, Chicago Muscle'll release an uber-limited run of 15 gray button-downs dubbed El Bandito, draped in hand-screened black bandoliers -- a not-so-subtle suggestion that'll allow you to enjoy unmolested any beverage involving Chai.