Well my buddys excuse for not training legs:
"Dude, all that shit about not training legs is bullshit. I mean, your legs will catch up since they have to hold up all that extra weight youll put on while doing upper body."
My ass! He is also one of those guys that claim
"Oh man, back then I used to be huge, twice as big as I am now, and with a beer gut. "
The beer gut part is just to make it believable. My ass.
The only thing that will happen if you dont train legs or lower back is you will be very unbalanced, and can cause some serious pain. You will probably have weak ab development if you do not squat.
I love squats. My ass is massive and so far I get nothing but compliments. Personally Im not really fond of it, but since it's highly regarded, I'm gonna have to change that view point.