A-style refers to the sexual position usually known as "doggy-style"
"Man, I bent her over and fucked that bitch A-style!"
N. Motorcyle attire company A-Style
V. Anal sex
Dude, I saw some A-style banners at the Moto-GP and checked out their website - their logo looks like 2 I guy taking another from behind. Now I know why they're called A-style.