Buttocks shown only once but if you were wondering there is no frontal nudity or any of that matter just the buttocks shown once and that's on the 5th episode.

Finally, a show without naked boobs.

Scenes where sex is implied (not shown though); no nudity throughout.

there are murders, stabbing, bludgeoning but most of the moments of murder are not directly shown (for example seeing the swing of a weapon and then seeing the dead person)

There is often a fair amount of gore shown (blood spatters, etc), and "brains" are shown.

words like "ass" and "bitch" are used on occasion

drinking, drugs and smoking are sometimes seen/referred to

It may be unsettling to see someone eating brains.