No, it's slang. Slang are not official words.
The correct word is either bottom or anus.
I believe a scientific word for Butthole is "Anus"
butthole butthole
in Portuguese: anusLatin for butthole is anus.
That is just a slang word. Butt is a common word that just means "end," like the end of a cigarette or a rifle. So the back end of the body, and the word hole makes it more specific that you mean the opening. Thus the opening in the back of the human body.
butthole
Chinese for "butthole"
stick your finger in his butthole and call it macaroni stick your finger in his butthole and call it macaroni stick your finger in his butthole and call it macaroni
My butthole
my butthole!
Butthole-ish
butthole or anus
butthole