Faggy isn't the right word. About every truck I've seen with the bull balls are heavy duty trucks driven by wimpy little guys. More sad than gay. A bunch of Pee Wee Hermans who would rather be Chuck Norris but will never get there. Or get the girls. Better they should get a Calvin peeing sticker.
Anyone with a pair of balls hanging from their truck probably also has a poster of a shirtless David Hasselhoff on the ceiling above their bed. Real men don't hang a pair of balls on anything other than their girlfriends chin!
More likely a shirtless picture of Kate Upton. They're not homos. I would call them Cowboy Nerds. The difference is that real nerds will end up creating some kind of internet startup and become rich and get all the women they want. The cowboy nerds will end up with wives that look like Petunia Pig who will make them take those stupid nuts off of their trucks.