Instead of "I butt dialed you" the more fitting expression from me would be "my dick dialed you". Because my butt is unable to use my phone, but my dick, on the other hand, is very much capable and very willing to do so. Plus, I don't carry my phone in my back pocket next to my butt, I carry it in my front pocket, like everyone else does, next to my dick. So.... I dick dialed you.