shorter way of saying/ proper way of saying I am sorry for being rude
 

I am a beginner in Japanese, and would like help with this word. I was messing around with the Japanese translator on google ( I know bad), and I was wondering what is the shorter way of saying/ proper I am sorry for being rude.

This what google said for the proper way of saying the phrase, "私は失礼して申し訳ありません。"

If you don't understand what I am asking for in "proper", I am asking for the polite way of saying it. As for the shorter way, I am talking about what you say to your friends/ what you say online to people.

I know I am being a tad confusing...

this should be fine. if you want to apologise for using bad words or something like that.
汚い言葉を使って、すみませんでした。
”きたないことばをつかって、すみませんでした”

or maybe you can say:
私は無礼を詫びる。
not so sure about second phrase. i am also still learning.
wait for one of the expert's advice.