disgraceful
Very shameful and bad, causing people to lose respect.
Disgraceful means shockingly bad or shameful, worthy of disgrace or disapproval. When something is disgraceful, it falls so far below acceptable standards that it brings shame or dishonor.
A disgraceful performance is embarrassingly bad, like a team that doesn't even try or a student who breaks the rules in front of everyone. Disgraceful behavior violates basic standards of decency or fairness. If someone lies to their best friend, steals from a charity, or bullies someone weaker, those actions are disgraceful because they violate trust and basic human decency.
The word carries real weight. Calling something disgraceful means it's genuinely shameful, beyond mere disappointment. A messy room might be untidy, but a disgraceful room would be so filthy that it's unhealthy. A losing sports team might feel disappointed, but a disgraceful loss would mean they gave up or didn't respect their opponents.
Disgrace itself means a loss of respect or honor, so something disgraceful is serious enough to damage someone's reputation or standing. When people say “that's disgraceful,” they're expressing strong disapproval, not just mild criticism.