"Disgraceful behavior" refers to actions or conduct that are unacceptable, shameful, or disrespectful. It describes behavior that brings shame or a bad reputation to someone or their actions. Full definition
Monkey want to apologize for disgraceful behavior of FAKE sugar baby monkey, who has been hurling outrageous nasty insults to blog posters. (blog.seekingarrangement.com)
I've been a Democrat all my life, and Rivera's disgraceful behavior since weaseling his way into the chairman's seat has been an ongoing embarrassment. (niagarafallsreporter.com)
Through his tirades and morally disgraceful behavior Rockstar managed to sell millions of copies of their GTA series and has become a household name in the industry. (thatvideogameblog.com)